anchor.diff:      {double textScale})
       : super(data, targetData, textScale: textScale) {
       touchHandler(this);
  -    
  +
       barPaint = Paint()..style = PaintingStyle.stroke;
   
       barAreaPaint = Paint()..style = PaintingStyle.fill;
  
positive.code:   /// [extraLinesPaint] is responsible to draw extra lines
    /// [touchLinePaint] is responsible to draw touch indicators(below line and spot)
    /// [bgTouchTooltipPaint] is responsible to draw box backgroundTooltip of touched point;
    Paint barPaint,
      barAreaPaint,
      barAreaLinesPaint,
  
negative.code:       ..style = PaintingStyle.stroke
        ..color = const Color(0x000000000)
        ..blendMode = BlendMode.dstIn;
  
      rangeAnnotationPaint = Paint()
        ..style = PaintingStyle.fill
        ..color = const Color(0xf5eaf1f6);
  
      extraLinesPaint = Paint()..style = PaintingStyle.stroke;
  
  