Is there any support for using SelectListItems as a datasource for ComboBoxes?
I would like to use it to do grouping, but I am unsure how to group where my datasource is a list of SelectListItems:
The following causes an error When I try to group on the Group's Name. Any other way of doing it?
<div class="demo-section k-content">    <h4>Customers</h4>    @(Html.Kendo().ComboBox()          .Name("customers")          .DataTextField("Text")          .DataValueField("Value")          .MinLength(3)          .HtmlAttributes(new { style = "width:100%;" })          .Height(400)          .DataSource(source =>  source              .Custom()              .Group(g => g.Add("Group.Name", typeof(string)))              .Transport(transport => transport                .Read(read =>                {                    read.Action("Customers_Read", "ComboBox")                        .Data("onAdditionalData");                }))              .ServerFiltering(true))     )</div><script>    function onAdditionalData() {        return {            text: $("#customers").val()        };    }</script>
