Kraken\Channel\Protocol\ProtocolInterface::getMessage PHP Method

    public function getMessage();

 /**
  * @param ChannelCompositeInterface $composite
  * @param ProtocolInterface $protocol
  */
 private function executeProtocol(ChannelCompositeInterface $composite, ProtocolInterface $protocol)
 {
     $params = json_decode($protocol->getMessage(), true);
     $command = array_shift($params);
     $params['origin'] = $protocol->getOrigin();
     $promise = $this->executeCommand($command, $params);
     if ($protocol->getType() === Channel::TYPE_REQ) {
         $promise->then(function ($response) use($composite, $protocol, $command) {
             return (new Response($composite, $protocol, $response))->call();
         }, function ($reason) use($composite, $protocol) {
             return (new Response($composite, $protocol, $reason))->call();
         }, function ($reason) use($composite, $protocol) {
             return (new Response($composite, $protocol, $reason))->call();
         });
     }
 }