default services conflit ?

old.vendor/doctrine/event-manager/lib/Doctrine/Common/EventSubscriber.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Common;
+
+/**
+ * An EventSubscriber knows himself what events he is interested in.
+ * If an EventSubscriber is added to an EventManager, the manager invokes
+ * {@link getSubscribedEvents} and registers the subscriber as a listener for all
+ * returned events.
+ */
+interface EventSubscriber
+{
+    /**
+     * Returns an array of events this subscriber wants to listen to.
+     *
+     * @return string[]
+     */
+    public function getSubscribedEvents();
+}