Install phan/phpstan local

vendor/sabre/event/lib/Emitter.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\Event;
+
+/**
+ * Emitter object.
+ *
+ * Instantiate this class, or subclass it for easily creating event emitters.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Emitter implements EmitterInterface
+{
+    use EmitterTrait;
+}