code: public void marshalling(Xdr xdr) {
          marshalling(xdr, _mode);
          marshalling(xdr, _uid);
          marshalling(xdr, _gid);
          if (_size != null) {
              xdr.putBoolean(true);
              xdr.putLong(_size.longValue());
          } else {
              xdr.putBoolean(false);
          }
          marshalling(xdr, _atime);
          marshalling(xdr, _mtime);
      }
docs: Set Xdr fields for the rpc call.
  
  @param xdr