EmitterController.php

<?php

/*
 * This file is part of the AdminLTE bundle.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace KevinPapst\AdminLTEBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Contracts\EventDispatcher\Event;

class EmitterController extends AbstractController
{
    /**
     * @var EventDispatcherInterface
     */
    protected $eventDispatcher;

    public function __construct(EventDispatcherInterface $dispatcher)
    {
        $this->eventDispatcher = $dispatcher;
    }

    protected function dispatch(Event $event): Event
    {
        /** @var Event $event */
        $event = $this->eventDispatcher->dispatch($event);

        return $event;
    }

    protected function hasListener(string $eventName): bool
    {
        return $this->eventDispatcher->hasListeners($eventName);
    }
}