copyOldSegmentValues method
      
  
void
copyOldSegmentValues()
       
    
    
override
    Implementation
@override
void copyOldSegmentValues(
  double seriesAnimationFactor,
  double segmentAnimationFactor,
) {
  if (series.animationType == AnimationType.loading) {
    points.clear();
    _oldSegmentRect = null;
    segmentRect = null;
    return;
  }
  if (series.animationDuration > 0) {
    _oldSegmentRect = Rect.lerp(
      _oldSegmentRect,
      segmentRect,
      segmentAnimationFactor,
    );
  } else {
    _oldSegmentRect = segmentRect;
  }
}