Widget _buildCapsuleSingleHandle(BuildContext context) {
    return TDSlider(
      sliderThemeData: TDSliderThemeData.capsule(
        min: 0,
        max: 100,
        scaleFormatter: (value) => value.toInt().toString(),
      ),
      leftLabel: '0',
      rightLabel: '100',
      value: 40,
      onChanged: (value) {},
    );
  }