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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\EventDispatcher;
use Psr\EventDispatcher\EventDispatcherInterface as PsrEventDispatcherInterface;
/**
* Allows providing hooks on domain-specific lifecycles by dispatching events.
*/
interface EventDispatcherInterface extends PsrEventDispatcherInterface
{
/**
* Dispatches an event to all registered listeners.
*
* @param object $event The event to pass to the event handlers/listeners
* @param string|null $eventName The name of the event to dispatch. If not supplied,
* the class of $event should be used instead.
*
* @return object The passed $event MUST be returned
*/
public function dispatch(object $event, string $eventName = null): object;
}