Widget _buildPureIconLoading(BuildContext context) {
    return _buildRow([
      const TDLoading(
        size: TDLoadingSize.small,
        icon: TDLoadingIcon.circle,
      ),
      const TDLoading(
        size: TDLoadingSize.small,
        icon: TDLoadingIcon.activity,
      ),
      TDLoading(
        size: TDLoadingSize.small,
        icon: TDLoadingIcon.point,
        iconColor: TDTheme.of(context).brandNormalColor,
      ),
    ]);
  }