canShowMarker property
Toggles the visibility of the marker in the tooltip.
Defaults to true.
late TooltipBehavior tooltipBehavior;
void initState() {
  tooltipBehavior = TooltipBehavior(
    enable: true,
    canShowMarker: false
  );
  super.initState();
}
Widget build(BuildContext context) {
  return SfCartesianChart(
    tooltipBehavior: tooltipBehavior
  );
}
Implementation
final bool canShowMarker;