diff --git a/core/modules/system/src/Controller/AssetControllerBase.php b/core/modules/system/src/Controller/AssetControllerBase.php
index 03f44da..a7ff9b3 100644
--- a/core/modules/system/src/Controller/AssetControllerBase.php
+++ b/core/modules/system/src/Controller/AssetControllerBase.php
@@ -234,15 +234,13 @@ public function deliver(Request $request, $file_name) {
    *   An object implementing AttachedAssetsInterface
    *  @param int $group_delta
    *    The group delta.
-   *  @param Symfony\Component\HttpFoundation\Request;
+   *  @param Symfony\Component\HttpFoundation\Request
    *    The current request.
    *
    * @return []
-   *   An array with 'key' and 'group' as keys, the hashed group as the value
-   *   for key and the individual group matching $group_delta as the value for
-   *   group.
+   *   The correct asset group matching $group_delta.
    */
-  abstract protected function getKeyAndGroup(AttachedAssetsInterface $attached_assets, $group_delta, $request);
+  abstract protected function getGroup(AttachedAssetsInterface $attached_assets, $group_delta, $request);
 
   /**
    * Optimize a group in preparation for serving an aggregate file.