public function close($replyCode = 0, $replyText = '', $methodSig = array(0, 0))
    {
        $args = new Writer();
        $args->writeShort($replyCode);
        $args->writeShortStr($replyText);
        $args->writeShort($methodSig[0]); // class_id
        $args->writeShort($methodSig[1]); // method_id
        $this->sendMethodFrame(array(10, 60), $args);
        return $this->wait(
            array(
                 "10,61", // Connection.close_ok
            )
        );
    }