anchor.diff:    Map<String, dynamic> _props = {} ;
     
     Map<String, dynamic> get properties => _props ;
  +  set properties(Map props) => _props = props ;
     
     NumericalList asNumericalListXValues() {
       return new NumericalList.fromList( getXValues() ) ;
  
positive.code:   
    List<XChartsDataSeries> get series => new List.from( this._allSeries ) ;
    List<XChartsDataSeries> get seriesEnabled => new List.from( this._allSeries.where( (s) => s.enabled ) ) ;
    
    void clearSeries() => _allSeries.clear() ;
    
  
negative.code:   }
    
    XChartsDataSeries clone(){
      List<XChartsData> newData = new List();
      this.data.forEach( (d) => newData.add(d.clone()) );
      XChartsDataSeries clone = new XChartsDataSeries(this.name, newData);
      clone.color = this.color;
      clone.enabled = this.enabled;
      
  