title: Cocoa - Where is the link between a NSCollectionView and a NSCollectionViewItem? Xcode 6 Bug?
body: <p>When you drag a NSCollectionView to a view, a NSCollectionViewItem appears on the storyboard, floating around. </p>
  
  <p>Imagine I drag several NScollectionViews to the same view. I will have a bunch of NSCollectionViewItems. How a collection view knows which NScollectionViewItem belongs to it? Is there a connection between the two that can be seen on interface builder? I don't see anything on interface builder? Where to do I see that?</p>
  
  <p>EDIT: Apparently this seems to be a Xcode bug. When you add a NSCollectionView to the storyboard, it comes without a link to the NSCollectionViewItem and it seems to be impossible to connect the itemPrototype outlet between them.</p>
  
  <p>After contacting Apple about bugs like this, their answer was: <strong>"this is a know issue with Storyboards on OS X. Use Xibs instead."</strong> </p>