code: @Override
  	public CheckpointData getCheckpointData(CheckpointDataKey key) {
  		logger.entering(CLASSNAME, "getCheckpointData", key==null ? "<null>" : key);
  		CheckpointData checkpointData = queryCheckpointData(key.getCommaSeparatedKey());
  		logger.exiting(CLASSNAME, "getCheckpointData", checkpointData==null ? "<null>" : checkpointData);
  		return checkpointData;
  	}
docs: /* (non-Javadoc)
  @see com.ibm.jbatch.container.services.impl.AbstractPersistenceManagerImpl#getCheckpointData(com.ibm.ws.batch.container.checkpoint.CheckpointDataKey)