anchor.diff:    //
     // Name property
     //
  -  String get name(){
  -    return _nameProperty.get(this);
  -  }
  +  String get name() => _nameProperty.get(this);
   
     void set name(String value){
       _nameProperty.set(this, value);
  
positive.code:   //
    // Age property
    //
    int get age(){
      return _ageProperty.get(this);
    }
  
    void set age(int value){
      _ageProperty.set(this, value);
  
negative.code:   //
    // Property changed event
    //
    EventRoot<String> get propertyChanged() => _propertyChangedEventHandle;
  
    void reset(){
      _nameProperty.clear(this);
  