anchor.diff:    }
   
     void _updateVisibility() {
  -    if (_control != null) _control.style.display = _visible ? 'inline' : 'block';
  +    if (_control != null) _reflowManager.invalidateCSS(_control, 'display', (_visible ? 'block' : 'none'));
     }
   
     void _addAllPendingElements() {
  
positive.code:     ) target = querySelector(_elementId);
      
      if (target != null) {
        _control = target..style.display = _visible ? 'inline' : 'block';
        
        _reflowManager = new ReflowManager();
  
  
negative.code:   //---------------------------------
  
    void _setControl(Element element) {
      _control = element;
      
      _updateVisibility();
      
      if (_inheritsDefaultCSS)
        _reflowManager.scheduleMethod(this, _addDefaultClass, [], forceSingleExecution: true);
  