dashArray property Null safety

List<double> dashArray

Dashes of the series.

Any number of values can be provided in the list. Odd value is considered as rendering size and even value is considered as gap.

Note: This is applicable for line, spline, step line, and fast line series only.

Defaults to null

Widget build(BuildContext context) {
   return Container(
       child: SfCartesianChart(
           series: <LineSeries<SalesData, String>>[
                  LineSeries<SalesData, String>(
                      dashArray: <double>[10, 10],


final List<double> dashArray;