DatasetInfo dsInfo = new DatasetInfo(101, null); LSMComponentIdGenerator idGenerator = new LSMComponentIdGenerator(numMemoryComponents, MIN_VALID_COMPONENT_ID); LSMIOOperationCallback callback = new LSMIOOperationCallback(dsInfo, mockIndex, idGenerator.getId(), mockIndexCheckpointManagerProvider()); ILSMComponentId nextComponentId = idGenerator.getId(); Map<String, Object> flushMap = new HashMap<>(); flushMap.put(LSMIOOperationCallback.KEY_FLUSH_LOG_LSN, flushLsn); nextComponentId = idGenerator.getId(); flushMap = new HashMap<>(); flushMap.put(LSMIOOperationCallback.KEY_FLUSH_LOG_LSN, flushLsn);