NeedlePointer class

Create the pointer to indicate the value with needle or arrow shape.

NeedlePointer contains three parts, namely needle, knob, and tail and that can be placed on a gauge to mark the values.

Widget build(BuildContext context) {
   return Container(
       child: SfRadialGauge(
         axes:<RadialAxis>[RadialAxis
         ( pointers: <GaugePointer>[
            NeedlePointer( value: 30,
          )])]
       ));
}