Symfony\Component\EventDispatcher\EventDispatcher::dispatch PHP Метод

    public function dispatch($eventName, Event $event = null)
    {
        if (null === $event) {
            $event = new Event();
        }

        $event->setDispatcher($this);
        $event->setName($eventName);

        if (!isset($this->listeners[$eventName])) {
            return $event;
        }

        $this->doDispatch($this->getListeners($eventName), $eventName, $event);

        return $event;
    }

 /**
  * @param array $items
  */
 public function write(array $items)
 {
     //      file_put_contents('options.json', json_encode($items));
     foreach ($items as $item) {
         try {
             $this->webservice->sendAttributeOption($item);
         } catch (\Exception $e) {
             $event = new InvalidItemEvent(__CLASS__, $e->getMessage(), array(), ['code' => key($item)]);
             // Logging file
             $this->eventDispatcher->dispatch(EventInterface::INVALID_ITEM, $event);
             // Loggin Interface
             $this->stepExecution->addWarning(__CLASS__, $e->getMessage(), array(), ['code' => key($item)]);
             /** @var ClientErrorResponseException  $e */
             if ($e->getResponse()->getStatusCode() <= 404) {
                 $e = new \Exception($e->getResponse()->getReasonPhrase());
                 $this->stepExecution->addFailureException($e);
                 $exitStatus = new ExitStatus(ExitStatus::FAILED);
                 $this->stepExecution->setExitStatus($exitStatus);
             }
             // Handle next element.
         }
         $this->stepExecution->incrementWriteCount();
         $this->stepExecution->incrementSummaryInfo('write');
     }
 }