code: protected void unmarshallingFileHandle(Xdr xdr, boolean force) {
          if (force || xdr.getBoolean()) {
              _fileHandle = xdr.getByteArray();
          }
      }
docs: Unmarshall the object if it is there, or skip the existence check if
  <code>force</code> is <code>true</code>. Convenience method for use in
  subclasses.
  
  @param xdr
  @param force