code: @Override
  	public int replace(int handle, Object obj) throws DataStoreException
      {
          if (SAFE_MODE) checkHandle(handle);
      	data[handle] = obj;
      	return handle;
      }
docs: /* (non-Javadoc)
  @see net.timewalker.ffmq4.storage.data.LinkedDataStore#replace(int, java.lang.Object)