title: Kendo grid with MVVM, binding column visibility
body: <p>I have a kendo grid using MVVM.
  My problem is I can't seem to set column visibility using the hidden attribute and an expression:</p>
  
  <pre><code>data-columns=
               "[{'template':'# if (User!=null) { # #=User.Name# # } #',
               'title':'User', 'hidden': User==null}
  </code></pre>
  
  <p>The template works, but the 'hidden' attribute doesn't seem to.</p>
  
  <p>Is there any way to get this to work?</p>