code: @Deprecated
    public Writable call(Writable param, InetSocketAddress address)
    throws IOException {
        return call(param, address, null);
    }
docs: Make a call, passing <code>param</code>, to the IPC server running at
  <code>address</code>, returning the value.  Throws exceptions if there are
  network problems or if the remote code threw an exception.
  @deprecated Use {@link #call(Writable, InetSocketAddress, Class, UserGroupInformation)} instead