anchor.diff:  
       globalStatus = StatusLine(CoreElement.from(queryId('global-status')));
       pageStatus = StatusLine(CoreElement.from(queryId('page-status')));
  -    auxiliaryStatus = StatusLine(CoreElement.from(queryId('auxiliary-status')));
  +    auxiliaryStatus = StatusLine(CoreElement.from(queryId('auxiliary-status')))
  +      ..defaultStatus = defaultAuxiliaryStatus;
   
       globalActions =
           ActionsContainer(CoreElement.from(queryId('global-actions')));
  
positive.code:       showSnapshotMessage();
        mainElement.clear();
        screens.removeWhere((screen) => screen.id == timelineScreenId);
      } else {
        navigateTo((_previous ?? current).id);
      }
  
negative.code:   SnapshotMessage snapshotMessage;
  
    AnalyticsOptInDialog analyticsDialog;
  
    final StatusItem defaultAuxiliaryStatus = createLinkStatusItem(
      span()..add(span(text: 'DevTools Docs', c: 'optional-700')),
      href: 'https://flutter.dev/docs/development/tools/devtools/overview',
      title: 'Documentation on using Dart DevTools',
    );
  
    void _initDragDrop() {
      window.addEventListener('dragover', (e) => _onDragOver(e), false);
  