title: NSCollectionViewItem double-click action?
body: <p>How do I set an action for when a user double clicks an <code>NSCollectionViewItem</code>. <code>NSTableView</code>, for example, has the <code>setDoubleAction</code> method. Is there something similar for <code>NSCollectionView</code>?</p>
  
  <p>Thanks</p>