code: public function add($queue_name, $message, array $options = NULL)
      {
          $this->queue_name = $queue_name;
          $this->message = $message;
  
          if ($options)
              $this->setOptions($options);
  
          $this->save();
      }
docs: Add a message directly to the queue server
  
  @param string $queue_name  Queue name on RabbitMQ
  @param string $message  Message to be add to the queue server
  @param array $options  Options values for message to add
  
  @return void