anchor.diff:    //---------------------------------
   
     void _setControl(Element element) {
  -    _control = element..hidden = !_visible;
  +    _control = element..style.display = _visible ? 'inline' : 'block';
       
       if (_inheritsDefaultCSS)
         _reflowManager.scheduleMethod(this, _addDefaultClass, [], forceSingleExecution: true);
  
positive.code:   }
  
    void _updateVisibility() {
      if (_control != null) _control.hidden = !_visible;
    }
  
    void _addAllPendingElements() {
  
negative.code:     ) target = querySelector(_elementId);
      
      if (target != null) {
        _control = target..style.display = _visible ? 'inline' : 'block';
        
        _reflowManager = new ReflowManager();
  
  