diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManager.php b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
index 97b290e..12c501c 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
@@ -193,13 +193,14 @@ public function getTasksBuild($route_name) {
     $tree = $this->getLocalTasksForRoute($route_name);
     $build = array();
 
-    // Fetch a bunch of routes at once.
+    // Collect all route names.
     $route_names = array();
     foreach ($tree as $instances) {
       foreach ($instances as $child) {
         $route_names[] = $child->getRouteName();
       }
     }
+    // Fetches all routes involved in the tree.
     $routes = $route_names ? $this->routeProvider->getRoutesByNames($route_names) : array();
 
     foreach ($tree as $level => $instances) {