start property Null safety

double? start

Start value of the multi-level label. The value from where the multi-level label border needs to start.

The start value for the category axis needs to string type, in the case of date-time or date-time category axes need to be date-time and in the case of numeric or logarithmic axes need to double.

Defaults to 'null'

Widget build(BuildContext context) {
  return Container(
    child: SfCartesianChart(
        NumericAxis(multiLevelLabels: const <NumericMultiLevelLabel>[
            start: 0,
            end: 4,
            text: 'First',


final double? start;