title: Nib-defined toolbar items in the customization palette
body: <p>I'm finding that with a toolbar defined in a nib, the toolbar delegate's <code>toolbar:itemForItemIdentifier:willBeInsertedIntoToolbar:</code> method doesn't get called. So how can I tell if one of my custom items is going into the customization palette? The docs say that in the nib case I can still use that method to "augment functionality", but I'm not getting any augmenting.</p>
  
  <p><strong>Update:</strong> I tried implementing that method in a subclass rather than the delegate. It does get called, and only when setting up the customize sheet, but strangely <code>toolbar</code> and <code>itemIdentifier</code> are nil for all items.</p>
  
  <p><strong>Update 2:</strong> I'm getting around this by overriding <code>viewWillMoveToWindow:</code> in my custom view, and checking whether the new window has a toolbar. I'm seeing the views get moved back and forth between toolbarless and toolbarred winodows, which suggests that this may actually be a better solution than a delegate method that only gets called when the item is created.</p>