decorate method
      
  
void
decorate(
    
    
- PointRendererElement<D> pointElement,
- ChartCanvas canvas,
- GraphicsFactory graphicsFactory, {
- required Rectangle<num> drawBounds,
- required double animationPercent,
- bool rtl = false,
override
    Implementation
@override
void decorate(PointRendererElement<D> pointElement, ChartCanvas canvas,
    GraphicsFactory graphicsFactory,
    {required Rectangle drawBounds,
    required double animationPercent,
    bool rtl = false}) {
  final points = computeBoundedPointsForElement(pointElement, drawBounds);
  if (points == null) {
    return;
  }
  final color = pointElement.color!.lighter;
  symbolRenderer.paint(canvas, points[0], pointElement.boundsLineRadiusPx,
      fillColor: color, strokeColor: color, p2: points[1]);
}