createRenderer method
Create the stacked area series renderer.
Implementation
StepLineSeriesRenderer createRenderer(ChartSeries<T, D> series) {
StepLineSeriesRenderer stepLineSeriesRenderer;
if (onCreateRenderer != null) {
stepLineSeriesRenderer =
onCreateRenderer!(series) as StepLineSeriesRenderer;
// ignore: unnecessary_null_comparison
assert(stepLineSeriesRenderer != null,
'This onCreateRenderer callback function should return value as extends from ChartSeriesRenderer class and should not be return value as null');
return stepLineSeriesRenderer;
}
return StepLineSeriesRenderer();
}