RRadialGauge constructor
      
      RRadialGauge({ 
    
    
- Key? key,
 - required RadialGauge rGauge,
 - required List<
Widget> children, 
Implementation
RRadialGauge({
  Key? key,
  required this.rGauge,
  required List<Widget> children,
}) : super(key: key, children: children);