[TOOLS] Continue raising PHPStan to level 6

components/Collection/Util/Controller/FeedController.php

@@ -44,6 +44,10 @@ abstract class FeedController extends OrderedCollection
      * Post-processing of the result of a feed controller, to remove any
      * notes or actors the user specified, as well as format the raw
      * list of notes into a usable format
+     *
+     * @template T of Note|Actor
+     * @param T[] $result
+     * @return T[]
      */
     protected function postProcess(array $result): array
     {
@@ -58,6 +62,9 @@ abstract class FeedController extends OrderedCollection
         return $result;
     }
 
+    /**
+     * @param Note[] $notes
+     */
     private static function enforceScope(array &$notes, ?Actor $actor, ?Actor $in = null): void
     {
         $notes = F\select($notes, fn (Note $n) => $n->isVisibleTo($actor, $in));