title: Get all TreeItems in an SWT Tree
body: <p>I want to get an array of all the TreeItems from my SWT Tree. However, the method included in the Tree class, <code>getItems()</code> only returns the items that are on the first level of the tree (i.e. that aren't children of anything).</p>
  
  <p>Can someone suggest a way to get all of the children/items?</p>