legendIconType property Null safety

LegendIconType? legendIconType

Shape of the legend icon. Any shape in the LegendIconType can be applied to this property. By default, icon will be rendered based on the type of the series.

Defaults to LegendIconType.seriesType

Also refer LegendIconType

Widget build(BuildContext context) {
   return Container(
       child: SfCartesianChart(
           series: <LineSeries<SalesData, String>>[
                  LineSeries<SalesData, String>(
                      legendIconType: LegendIconType.diamond,


final LegendIconType? legendIconType;