Function callback

packages/router/test/integration/router_events.spec.ts:132–132

(r: boolean)

      const fixture = await createRoot(router, RootCmp);
      let result = null as boolean | null;
      const callback = (r: boolean) => (result = r);
      router.resetConfig([{path: 'user/:name', component: UserCmp}]);

      router.navigateByUrl('/user/frodo').then(callback);