anchor.diff:    String _labelX ;
     String _labelY ;
     String hint ;
  +  int _hintHeight ;
     
     String get labelX => _labelX != null ? _labelX : valueX.toString() ;
     String get labelY => _labelY != null ? _labelY : valueY.toString() ;
  
positive.code:         
          _currentHintElements[e] = prevHint = _createHint(e,distance) ;
          //Distance hint in px
          distance += 24 ;
        }
        hintsMap[e] = prevHint ;
      }
  
negative.code:     return _data.hint != null ;
    }
    
    int get hintHeight => _data.hintHeight ;
    
  }
  
  class XChartsElementDetail extends XChartsElement {
  