Adam G-H
--- a/src/Controller/UpdateController.php
+++ b/src/Controller/UpdateController.php
  /**
   * Constructs an UpdateController object.
   *
-   * @param \Drupal\Core\Update\UpdateHookRegistry $update_hook_registry
+   * @param object $update_hook_registry
   *   The update hook registry service.
   * @param \Drupal\Core\Update\UpdateRegistry $post_update_registry
   *   The post-update registry service.
+   *
+   * @todo Give $update_hook_registry the \Drupal\Core\Update\UpdateHookRegistry
+   *   type hint when 9.3 is the minimum supported version of core.
   */
-  public function __construct(UpdateHookRegistry $update_hook_registry, UpdateRegistry $post_update_registry) {
+  public function __construct(object $update_hook_registry, UpdateRegistry $post_update_registry) {