default services conflit ?

old.vendor/symfony/event-dispatcher/Event.php

@@ -0,0 +1,38 @@
+<?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\Component\EventDispatcher;
+
+/**
+ * @deprecated since Symfony 4.3, use "Symfony\Contracts\EventDispatcher\Event" instead
+ */
+class Event
+{
+    private $propagationStopped = false;
+
+    /**
+     * @return bool Whether propagation was already stopped for this event
+     *
+     * @deprecated since Symfony 4.3, use "Symfony\Contracts\EventDispatcher\Event" instead
+     */
+    public function isPropagationStopped()
+    {
+        return $this->propagationStopped;
+    }
+
+    /**
+     * @deprecated since Symfony 4.3, use "Symfony\Contracts\EventDispatcher\Event" instead
+     */
+    public function stopPropagation()
+    {
+        $this->propagationStopped = true;
+    }
+}