Radio 

A representation of Radio Buttons.
NikuRadio accepts all the props as same as Radio.
dart
// Using namespace
n.Radio(true);
// Using Niku Prefix
NikuRadio(true);Example Usage 
dart
n.Radio(state)
    ..onChanged = updateState;Declarative color 
Using declarative hook to update MaterialStateProperty, consists of:
- fillColor
- overlayColor
dart
n.Radio(state)
    ..onChanged = updateState
    ..useFillColor(
        base: Colors.gray,
        hovered: Colors.blue,
        pressed: Colors.blue,
        focused: Colors.blue,
    )
    ..useOverlayColor(
        all: Colors.blue,
    );