Symfony\Component\EventDispatcher\EventDispatcher::addListener PHP Метод

    public function addListener($eventName, $listener, $priority = 0)
    {
        $this->listeners[$eventName][$priority][] = $listener;
        unset($this->sorted[$eventName]);
    }

 public function __construct(EventDispatcher $dispatcher)
 {
     $this->stdErr = fopen('php://stderr', 'w');
     $this->output = new StreamOutput($this->stdErr);
     $this->eventDispatcher = $dispatcher;
     $this->eventDispatcher->addListener(FixerFileProcessedEvent::NAME, array($this, 'onFixerFileProcessed'));
 }