Generalized Feature Trees (GFTs)

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features
	XOR_Root {abstract, aux}
		alternative
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				optional
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsDatabase 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						optional
							FStatistics {abstract}
								optional
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												or
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
													featureStatisticsPreload 
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								optional
									BTree {abstract}
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingInfo 
										optional
											featureLoggingConfig 
										optional
											featureLoggingSevere 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingConfig 
										optional
											featureLoggingSevere 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureEnvironmentLock 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingInfo 
										optional
											featureLoggingConfig 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingConfig 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								optional
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										optional
											FPersistencyFeatures {abstract}
												or
													featureHandleFullDiscError 
													Checkpointer {abstract}
														optional
															featureCheckpointerDaemon 
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingInfo 
										optional
											featureLoggingConfig 
										optional
											featureLoggingSevere 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingConfig 
										optional
											featureLoggingSevere 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												mandatory
													featureEnvironmentLock 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingInfo 
										optional
											featureLoggingConfig 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
								optional
									Logging {abstract}
										mandatory
											featureLoggingBase 
										optional
											featureLoggingFile 
										optional
											featureLoggingConsole 
										optional
											featureLoggingDbLog 
										optional
											featureLoggingFinest 
										optional
											featureLoggingFiner 
										optional
											featureLoggingFine 
										optional
											featureLoggingConfig 
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
												optional
													featureStatisticsTransaction 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									featureTransaction 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureLookAheadCache 
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										mandatory
											FEvictor {abstract}
												mandatory
													Evictor {abstract}
														mandatory
															featureEvictor 
														optional
															featureCriticalEviction 
														optional
															featureEvictorDaemon 
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvEvictor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
														optional
															featureStatisticsEnvCaching 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							featureMemoryBudget 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									featureLatch 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
						mandatory
							FDbOperation {abstract}
								mandatory
									featureDeleteDb 
								mandatory
									featureTruncateDb 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvFSync 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									featureFSync 
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureVerifier 
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureTreeVisitor 
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsDatabase 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
								mandatory
									featureCheckLeaks 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureFileHandleCache 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												mandatory
													featureChecksum 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking 
			BerkeleyDb {abstract}
				mandatory
					BerkeleyDB {abstract}
						mandatory
							FPersistency {abstract}
								mandatory
									Persistency {abstract}
										mandatory
											FIOFeature {abstract}
												alternative
													NIO {abstract}
														mandatory
															FNIOType {abstract}
																alternative
																	featureNIO 
																	featureChunkedNIO 
														optional
															featureDirectNIO 
													IO {abstract}
														mandatory
															featureIO 
														optional
															featureSynchronizedIO 
										mandatory
											FPersistencyFeatures {abstract}
												mandatory
													Checkpointer {abstract}
														mandatory
															featureCustomizableCheckpointerTime 
														optional
															featureCustomizableCheckpointerBytes 
														optional
															featureCheckpointerDaemon 
												optional
													featureHandleFullDiscError 
												optional
													Cleaner {abstract}
														optional
															featureCleanerDaemon 
						mandatory
							FBtree {abstract}
								mandatory
									BTree {abstract}
										mandatory
											featureINCompressor 
										optional
											FEvictor {abstract}
						mandatory
							BASE 
						optional
							FLogging {abstract}
						mandatory
							FStatistics {abstract}
								mandatory
									Statistics {abstract}
										mandatory
											FStatisticsFeatures {abstract}
												mandatory
													featureStatisticsLock 
												optional
													EnvStats {abstract}
														mandatory
															featureStatisticsEnvBase 
														optional
															featureStatisticsEnvLog 
														optional
															featureStatisticsEnvINCompressor 
														optional
															featureStatisticsEnvCleaner 
														optional
															featureStatisticsEnvCheckpointer 
												optional
													featureStatisticsPreload 
												optional
													featureStatisticsSequence 
										mandatory
											featureStatisticsBase 
						mandatory
							FConcurrency {abstract}
								mandatory
									dummyFeatureLocking