anchor.diff:      String ret = '';
   
       if (elements.length > 0) {
  -      Map<String, String> attrs = getCssAttributeMap(elements[0]);
  +      Map<String, String> attrs = getCssAttrMap(elements[0]);
   
         name = name.toLowerCase();
         if (attrs.containsKey(name)) {
  
positive.code: 
    void setCssAttr(String name, String value) {
      elements.forEach((Element element) {
        Map<String, String> attrs = getCssAttributeMap(element);
  
        attrs[name] = value;
        setCssAttributeMap(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');
  
  