createRenderer method
To create a step area series renderer.
Implementation
@override
StepAreaSeriesRenderer<T, D> createRenderer() {
StepAreaSeriesRenderer<T, D> stepAreaRenderer;
if (onCreateRenderer != null) {
stepAreaRenderer =
onCreateRenderer!(this) as StepAreaSeriesRenderer<T, D>;
return stepAreaRenderer;
}
return StepAreaSeriesRenderer<T, D>();
}