code: public void writeRemote(String type, String url)
          throws IOException
      {
          os.write('r');
          os.write('t');
          printLenString(type);
          os.write('S');
          printLenString(url);
      }
docs: Writes a remote object reference to the stream.  The type is the
  type of the remote interface.
  
  <code><pre>
  'r' 't' b16 b8 type url
  </pre></code>