code: public void writeRef(int value)
          throws IOException
      {
          os.write('R');
          os.write(value >> 24);
          os.write(value >> 16);
          os.write(value >> 8);
          os.write(value);
      }
docs: Writes a reference.
  
  <code><pre>
  R b32 b24 b16 b8
  </pre></code>
  
  @param value the integer value to write.