Kraken\Channel\Channel::sendRequest PHP Method

    public function sendRequest($name, $message, $flags = Channel::MODE_DEFAULT, callable $success = null, callable $failure = null, callable $cancel = null, $timeout = 0.0)
    {
        $protocol = $this->createMessageProtocol($message);
        $names = (array) $name;
        $handlers = [];
        foreach ($names as $name) {
            $handlers[] = $this->handleSendRequest($name, $protocol, $flags, $success, $failure, $cancel, $timeout);
        }
        return !isset($handlers[0]) || isset($handlers[1]) ? $handlers : $handlers[0];
    }