NumberPickerFormField constructor 
    
    
    
  Implementation
  NumberPickerFormField({
  required FormFieldSetter<int> super.onSaved,
  required FormFieldValidator<int> super.validator,
  super.key,
  void Function(int value)? onChanged,
  int super.initialValue = 0,
  int minValue = 0,
  int maxValue = 100,
  Axis axis = Axis.vertical,
}) : super(
        builder: (FormFieldState<int> state) => NumberPicker(
          minValue: minValue,
          maxValue: maxValue,
          value: initialValue,
          onChanged: (int value) {
            onChanged?.call(value);
            state.didChange(value);
          },
          itemHeight: 35,
          itemWidth: 35,
          itemCount: 5,
          axis: axis,
        ),
      );