anchor.diff:      return ret;
     }
   
  -  void setCssAttrMap(Element element, Map<String, String> attrs) {
  +  void _setCssAttrMap(Element element, Map<String, String> attrs) {
       List<String> arr = new List<String>();
   
       attrs.keys.forEach((String key) {
  
positive.code: 
    void setCssAttr(String name, String value) {
      elements.forEach((Element element) {
        Map<String, String> attrs = getCssAttrMap(element);
  
        attrs[name] = value;
        setCssAttrMap(element, attrs);
      });
    }
  
  
negative.code:     return ret;
    }
  
    Map<String, String> _getCssAttrMap(Element element) {
      Map<String, String> ret = new Map<String, String>();
      String css = element.getAttribute('style');
  
  