Add generic types to traversable implementations

Author: derrabus

Extension/ProfilerExtension.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Twig\Extension;
 
 use Symfony\Component\Stopwatch\Stopwatch;
+use Symfony\Component\Stopwatch\StopwatchEvent;
 use Twig\Extension\ProfilerExtension as BaseProfilerExtension;
 use Twig\Profiler\Profile;
 
@@ -21,6 +22,10 @@
 final class ProfilerExtension extends BaseProfilerExtension
 {
     private $stopwatch;
+
+    /**
+     * @var \SplObjectStorage<Profile, StopwatchEvent>
+     */
     private $events;
 
     public function __construct(Profile $profile, Stopwatch $stopwatch = null)