anchor.diff:  
     void setCssAttr(String name, String value) {
       elements.forEach((Element element) {
  -      Map<String, String> attrs = getCssAttrMap(element);
  +      Map<String, String> attrs = _getCssAttrMap(element);
   
         attrs[name] = value;
  -      setCssAttrMap(element, attrs);
  +      _setCssAttrMap(element, attrs);
       });
     }
   
  
positive.code:     return ret;
    }
  
    void setCssAttrMap(Element element, Map<String, String> attrs) {
      List<String> arr = new List<String>();
  
      attrs.keys.forEach((String key) {
  
negative.code:     String ret = '';
  
      if (elements.length > 0) {
        Map<String, String> attrs = _getCssAttrMap(elements[0]);
  
        name = name.toLowerCase();
        if (attrs.containsKey(name)) {
  