anchor.diff:    /// show indicators based on provided indexes
     final List<int> showingIndicators;
   
  -  final CircularIntervalList<double> dashArray;
  +  final CircularArray dashArray;
   
     const LineChartBarData({
       this.spots = const [],
  
positive.code:   @override
    LineChartData lerp(double t) => begin.lerp(begin, end, t);
  }
  
negative.code:     BarAreaData belowBarData,
      BarAreaData aboveBarData,
      FlDotData dotData,
      CircularArray dashArray,
      List<int> showingIndicators,
    }) {
      return LineChartBarData(
  