protected function basic_return($reader, $message)
    {
        $callback = $this->basic_return_callback;
        if (!is_callable($callback)) {
            $this->debug->debug_msg('Skipping unhandled basic_return message');
            return null;
        }

        $reply_code = $reader->read_short();
        $reply_text = $reader->read_shortstr();
        $exchange = $reader->read_shortstr();
        $routing_key = $reader->read_shortstr();

        call_user_func_array($callback, array(
            $reply_code,
            $reply_text,
            $exchange,
            $routing_key,
            $message,
        ));
    }