title: ExtJS XTemplate and empty JSON parsing
body: <p>How do you determine that a JSON object is empty in a XTemplate? I've tried</p>
  
  <pre><code>&lt;tpl if="myObject != {}"&gt;
  &lt;tpl if="myObject"&gt;
  &lt;tpl if="myObject != undefined"&gt;
  </code></pre>
  
  <p>etc, but can't seem to find the right way to detect an empty object. Thanks.</p>