public override void Init(TagHelperContext context) {
     base.Init(context);
     FormContext = context.HasFormContext() ? context.GetFormContext() : new FormTagHelper();
     context.SetFormContext(new FormTagHelper {
         ControlSize = ControlSize ?? FormContext.ControlSize,
         Output = FormContext.Output,
         Inline = FormContext.Inline,
         Horizontal = FormContext.Horizontal,
         LabelWidthXs = FormContext.LabelWidthXs,
         LabelWidthLg = LabelWidthLg ?? FormContext.LabelWidthLg,
         LabelWidthMd = LabelWidthMd ?? FormContext.LabelWidthMd,
         LabelWidthSm = LabelWidthSm ?? FormContext.LabelWidthSm,
         LabelsSrOnly = FormContext.LabelsSrOnly
     });
     context.SetFormGroupContext(this);
     Size = Size ?? FormContext.FormGroupSize;
 }