add imports

src/Umbraco.Web.UI.Client/src/apps/app/app.element.ts

@@ -12,6 +12,11 @@ import type { Guard, UmbRoute } from '@umbraco-cms/backoffice/router';
 import { pathWithoutBasePath } from '@umbraco-cms/backoffice/router';
 import { OpenAPI, RuntimeLevelModel } from '@umbraco-cms/backoffice/external/backend-api';
 import { UmbContextDebugController } from '@umbraco-cms/backoffice/debug';
+import {
+	UmbBundleExtensionInitializer,
+	UmbEntryPointExtensionInitializer,
+} from '@umbraco-cms/backoffice/extension-api';
+import { umbExtensionsRegistry } from '@umbraco-cms/backoffice/extension-registry';
 
 @customElement('umb-app')
 export class UmbAppElement extends UmbLitElement {