anchor.diff:      context.onDartReconcile.listen((_) => performAnalysis());
   
       Property htmlFile =
  -        GistFileProperty(editableGist.getGistFile('index.html')!);
  +        GistFileProperty(_editableGist.getGistFile('index.html')!);
       Property htmlDoc = EditorDocumentProperty(context.htmlDocument, 'html');
       bind(htmlDoc, htmlFile);
       bind(htmlFile, htmlDoc);
   
       Property cssFile =
  -        GistFileProperty(editableGist.getGistFile('styles.css')!);
  +        GistFileProperty(_editableGist.getGistFile('styles.css')!);
       Property cssDoc = EditorDocumentProperty(context.cssDocument, 'css');
       bind(cssDoc, cssFile);
       bind(cssFile, cssDoc);
   
       Property dartFile =
  -        GistFileProperty(editableGist.getGistFile('main.dart')!);
  +        GistFileProperty(_editableGist.getGistFile('main.dart')!);
       Property dartDoc = EditorDocumentProperty(context.dartDocument, 'dart');
       bind(dartDoc, dartFile);
       bind(dartFile, dartDoc);
  
positive.code:         _disposeOutputPanelTabs();
          _rightDocPanel.attributes.remove('hidden');
          _rightConsoleElement.attributes.remove('hidden');
          webTabBar.setAttr('hidden');
          webLayoutTabController.selectTab('dart');
          _initRightSplitter();
          editorPanelHeader.setAttr('hidden');
          webOutputLabel.setAttr('hidden');
          break;
        case Layout.html:
          _disposeRightSplitter();
  
negative.code:   Future<bool> handleRun() async {
      var success = await super.handleRun();
      if (success) {
        _webOutputLabel.setAttr('hidden');
      }
      return success;
    }
  