anchor.diff:    }
   
     @override
  -  final attrToPropMap = const {
  +  Map<String, String> get attrToPropMap => const <String, String>{
       'innerHtml': 'innerHtml',
       'readonly': 'readOnly',
       'tabindex': 'tabIndex',
     };
   
  -  query(String selector) => document.querySelector(selector);
  +  Element query(String selector) => document.querySelector(selector);
   
     Element querySelector(el, String selector) => el.querySelector(selector);
   
  
positive.code:   Element remove(Element el) {
      return el..remove();
    }
    insertBefore(Node el, node) {
      el.parentNode.insertBefore(node, el);
    }
    void insertAllBefore(Node el, Iterable<Node> nodes) {
  
negative.code:   bool hasClass(Element element, String classname) =>
        element.classes.contains(classname);
  
    void setStyle(Element element, String stylename, String stylevalue) {
      element.style.setProperty(stylename, stylevalue);
    }
    void removeStyle(Element element, String stylename) {
      element.style.removeProperty(stylename);
    }
    String getStyle(Element element, String stylename) {
      return element.style.getPropertyValue(stylename);
    }
  
  