anchor.diff:      Color color = Colors.black,
       double strokeWidth = 2,
       List<int> dashArray,
  +    this.image,
  +    this.sizedPicture,
     }) : super(color: color, strokeWidth: strokeWidth, dashArray: dashArray);
   
     static HorizontalLine lerp(HorizontalLine a, HorizontalLine b, double t) {
  
positive.code:   @override
    LineChartData lerp(double t) => begin.lerp(begin, end, t);
  }
  
negative.code: /// and the y is dynamic
  class HorizontalLine extends FlLine {
    final double y;
    Image image;
    SizedPicture sizedPicture;
    final HorizontalLineLabel label;
  
    HorizontalLine({
  