EventListener/DataQueueEventListener.php
public function getQueue($processName): \SplQueue
    {
        if (!array_key_exists($processName, $this->queues)) {
            $this->queues[$processName] = new \SplQueue();
        }

        return $this->queues[$processName];
    }
public function getQueue($processName): \SplQueue
    {
        if (!array_key_exists($processName, $this->queues)) {
            $this->queues[$processName] = new \SplQueue();
        }

        return $this->queues[$processName];
    }
@param string $processName

@return \SplQueue