I need help using viewbag value to hide a column in my Kendo UI grid

Hi Experts,
I have an MVC.Net application with C#.Net code behind.
I want to use a Viewbag value to determine if some columns in my Kendo UI grid should be hidden or not.

below is a snippet of the code I was trying to use, but it does not work.
How can I make this work?

columns: [
@if(ViewBag.AllowEdit)
{
        {   
             field: "IPA",
             title: "IPA",
         },
        {
             field: "TEST",
             title: "TEST",
        },
}

Thanks in advance,
mrotor