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vendor/symfony/event-dispatcher-contracts/EventDispatcherInterface.php

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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.
+     *
+     * @template T of object
+     *
+     * @param T           $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 T The passed $event MUST be returned
+     */
+    public function dispatch(object $event, string $eventName = null): object;
+}