anchor.diff:          'loading' : loading,
           'items' : items,
           'selectorText' : selectorText,
  -        'fullSize' : fullSize,
  +        'className' : className,
           'onChange': onChange,
  +        'showFirstLast' : showFirstLast,
         });
       };
     }
  
positive.code:     checkSetScrollStepRedraw(_scrollStep, _scrollListDiv);
    }
  
    scroll({toLeft: true}) {
      var _itemSpan = ref(items[0][VALUE].toString());
      var _scrollListDiv = ref('round-list');
      var _visibleItemsWindowSize = scrollStep * _itemSpan.marginEdge.width;
      var _scrollStep = _scrollListDiv.style.marginLeft;
  
      setScrollStepSize();
  
      if (_scrollStep == '') {
        _scrollListDiv.style.marginLeft = '-5px';
  
negative.code:     checkSetScrollStepRedraw(_scrollStep, _scrollListDiv);
    }
  
    num getMinMarginLeft() =>
        (0 - _spanWidth * items.length + ref('itemsDiv').marginEdge.width);
  
    checkSetScrollStepRedraw(_scrollStep, _scrollListDiv){
      if (_scrollStep > 0){
  