@EventMask
    private static short mergeEventMask(@EventMask short existingOperation, @EventMask short newOperation) {
      if (newOperation == FILE_REMOVED) {
        return FILE_REMOVED;
      }
      return (short)(existingOperation | newOperation);
    }
@EventMask
    private static short mergeEventMask(@EventMask short existingOperation, @EventMask short newOperation)