anchor.diff:        );
   
         // Open the new route.
  -      await tester.tap(find.byType(RaisedButton));
  +      await tester.tap(find.byType(ElevatedButton));
         await tester.pumpAndSettle();
         expect(find.text('Open page'), findsNothing);
         expect(find.text('Page Two'), findsOneWidget);
  
positive.code:         onGenerateRoute: (RouteSettings settings) {
            return MaterialPageRoute<dynamic>(
              builder: (BuildContext context) {
                return RaisedButton(
                  onPressed: () {
                    Navigator.of(context).push<void>(
                      PageRouteBuilder<void>(
  
negative.code:           onGenerateRoute: (RouteSettings settings) {
              return MaterialPageRoute<dynamic>(
                builder: (BuildContext context) {
                  return ElevatedButton(
                    onPressed: () {
                      Navigator.of(context).push<void>(
                        PageRouteBuilder<void>(
  