@model Boolean?

@{
    Layout = "_FieldLayout.cshtml";

    var htmlAttributes = new RouteValueDictionary();
    if (ViewBag.@class != null)
    {
        htmlAttributes.Add("class", ViewBag.@class);
    }
}

@if (Model.HasValue && Model.Value)
{
    <input id="@ViewData.TemplateInfo.GetFullHtmlFieldId("")" name="@ViewData.TemplateInfo.GetFullHtmlFieldId("")"
           type="checkbox" checked="checked" />
}
else
{
    <input id="@ViewData.TemplateInfo.GetFullHtmlFieldId("")" name="@ViewData.TemplateInfo.GetFullHtmlFieldId("")"
           type="checkbox" />
}