series property
Customizes the chart series.
Widget build(BuildContext context) {
   return Container(
       child: SfCircularChart(
           series: <PieSeries<ChartData, String>>[
             PieSeries<ChartData, String>(
               dataSource: chartData,
             ),
          ],
       )
   );
}
Implementation
final List<CircularSeries> series;