Issue #3298889: Make \Drupal\package_manager_test_api\ApiController more easily extendable

automatic_updates_extensions/tests/modules/automatic_updates_extensions_test_api/src/ApiController.php

@@ -12,7 +12,7 @@ use Drupal\package_manager_test_api\ApiController as PackageManagerApiController
 class ApiController extends PackageManagerApiController {
 
   /**
-   * The stage.
+   * The extension updater.
    *
    * @var \Drupal\automatic_updates_extensions\ExtensionUpdater
    */
@@ -21,7 +21,7 @@ class ApiController extends PackageManagerApiController {
   /**
    * {@inheritdoc}
    */
-  protected $finished_route = 'automatic_updates_extensions_test_api.finish';
+  protected $finishedRoute = 'automatic_updates_extensions_test_api.finish';
 
   /**
    * {@inheritdoc}