--- /dev/null
+<?php
+
+namespace Drupal\webprofiler\EventDispatcher;
+
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+
+interface EventDispatcherTraceableInterface extends EventDispatcherInterface {
+
+ /**
+ * @return array
+ */
+ public function getCalledListeners();
+
+ /**
+ * @return mixed
+ */
+ public function getNotCalledListeners();
+
+}