rangeController property Null safety

RangeController? rangeController
final

Controller used to set the maximum and minimum values for the chart.By providing the range controller, the maximum and The minimum range of charts can be customized

Widget build(BuildContext context) {
   return Container(
       child: SfCartesianChart(
          primaryXAxis: NumericAxis(
            rangeController: controller,
              ),
       ));
}

Implementation

final RangeController? rangeController;