title: Flex: Expand AdvancedDataGrid Tree Column programmatically
body: <p>Does anyone know how to programmatically expand the nodes of an AdvancedDataGrid tree column in Flex? If I was using a tree I would use something like this:</p>
  
  <pre><code>dataGrid.expandItem(treeNodeObject, true);
  </code></pre>
  
  <p>But I don't seem to have access to this property in the AdvancedDataGrid.</p>