selectionBehavior property Null safety

SelectionBehavior selectionBehavior
final

Customizes the selection of series.

SelectionBehavior _selectionBehavior;

void initState() {
  _selectionBehavior = SelectionBehavior(enable: true);
  super.initState();
}

Widget build(BuildContext context) {
   return Container(
       child: SfCircularChart(
          series: <PieSeries<ChartData, String>>[
               PieSeries<ChartData, String>(
                 selectionBehavior: _selectionBehavior
               ),
             ],
       )
   );
}

Implementation

@override
final SelectionBehavior selectionBehavior;