Issue #3408449: Cleanup creators to properly handle static types

src/Plugin/Action/GenerateUserHash.php

@@ -20,7 +20,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   type = "user"
  * )
  */
-class GenerateUserHash extends ActionBase implements ContainerFactoryPluginInterface {
+final class GenerateUserHash extends ActionBase implements ContainerFactoryPluginInterface {
 
   /**
    * The user hash services.
@@ -39,8 +39,8 @@ class GenerateUserHash extends ActionBase implements ContainerFactoryPluginInter
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): GenerateUserHash {
-    $instance = new self($configuration, $plugin_id, $plugin_definition);
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): static {
+    $instance = new static($configuration, $plugin_id, $plugin_definition);
     $instance->userHashService = $container->get('user_hash.services');
     $instance->userData = $container->get('user.data');
     return $instance;