anchor.diff:  
       _showGist(gistId, run: page == 'run');
       _storePreviousResult();
  +  }
  +
  +  void registerStrongMode() {
  +    showStrong();
  +    querySelector('#strongmode').onChange.listen((e) {
  +      _performAnalysis();
  +    });
     }
   
     void registerMessageToast() {
  
positive.code:   void showStrong() {
      Uri url = Uri.parse(window.location.toString());
      String strong = url.queryParameters['strong'];
      if (_isStrongMode(strong)) {
        (querySelector('#strongmode') as InputElement).checked = true;
      }
      querySelector('#strongmode').onChange.listen((e) {
        _performAnalysis();
      });
    }
  
    void showHome(RouteEnterEvent event) {
  
negative.code:   /**
     * Return if strong mode should be enabled
     */
    bool _parseStrongModeParam(String strongModeValueString) {
      if (strongModeValueString == null) return false;
      return (strongModeValueString == 'true' || strongModeValueString == 't');
    }
  
    /**
  