public static string RenderFormGroupRadioButton(HtmlHelper html, RadioButtonModel inputModel, LabelModel labelModel)
        {
            string validationMessage = "";
            string radioType = "form-icon";

            if (inputModel.displayValidationMessage)
            {
                string validation = html.ValidationMessage(inputModel.htmlFieldName).ToHtmlString();
                validationMessage = new HelpText(validation, inputModel.validationMessageStyle).ToHtmlString();
            }

            if (labelModel == null && inputModel.RadioType != InputRadioCheckBoxType._NotSet)
                radioType = inputModel.RadioType.ToName();

            var label = RenderControl.RenderLabel(html, labelModel ?? new LabelModel
            {
                htmlFieldName = inputModel.htmlFieldName,
                metadata = inputModel.metadata,
                innerInputType = InputType.Radio,
                innerInputModel = inputModel,
                innerValidationMessage = validationMessage,
                htmlAttributes = new { @class= $"form-radio {radioType} form-text" }.ToDictionary()
            });

            bool fieldIsValid = true;

            if (inputModel != null)
                fieldIsValid = html.ViewData.ModelState.IsValidField(inputModel.htmlFieldName);

            return new FormGroup(null, label, FormGroupType.CheckBoxLike, fieldIsValid).ToHtmlString();
        }
        public static HtmlString RenderRadioButton(HtmlHelper html, RadioButtonModel model)
        {
            model.htmlAttributes.MergeHtmlAttributes(html.GetUnobtrusiveValidationAttributes(model.htmlFieldName, model.metadata));

            if (!string.IsNullOrEmpty(model.id))
                model.htmlAttributes.AddOrReplace("id", model.id);

            string validationMessage = "";

            if (model.displayValidationMessage)
            {
                string validation = html.ValidationMessage(model.htmlFieldName).ToHtmlString();
                validationMessage = new HelpText(validation, model.validationMessageStyle).ToHtmlString();
            }

            return new HtmlString(html.RadioButton(model.htmlFieldName, model.value, model.isChecked, model.htmlAttributes.FormatHtmlAttributes()).ToHtmlString() + validationMessage);
        }