customizeSegment method
Changes the series color, border color, and border width.
Implementation
@override
void customizeSegment(ChartSegment segment) {
final StackedArea100Segment<T, D> stackedArea100Segment =
segment as StackedArea100Segment<T, D>;
updateSegmentColor(stackedArea100Segment, borderColor, borderWidth);
updateSegmentGradient(stackedArea100Segment,
gradientBounds: stackedArea100Segment._fillPath.getBounds(),
gradient: gradient,
borderGradient: borderGradient);
}