Widget _checkStyle(BuildContext context) {
    return Column(
      children: [
        TDRadioGroup(
          radioCheckStyle: TDRadioStyle.check,
          selectId: 'index:0',
          child: const TDRadio(
            id: 'index:0',
            title: '单选',
          ),
        ),
        const SizedBox(
          height: 17,
        ),
        TDRadioGroup(
          radioCheckStyle: TDRadioStyle.hollowCircle,
          selectId: 'index:0',
          child: const TDRadio(
            id: 'index:0',
            title: '单选',
          ),
        )
      ],
    );
  }