title: NSNotification.Name.frameDidChangeNotification not found
body: <p>What is the current path of frameDidChangeNotification (and  boundsDidChangeNotification, I assume) ?</p>
  
  <p>The <em>NSView.postsFrameChangedNotifications</em> and <em>NSView.postBoundsChangeNotifications</em> properties are available, but compiler does not find <em>NSNotification.Name.frameDidChangeNotification</em> and <em>NSNotification.Name.boundsDidChangeNotification</em> (tried also Notification.Name.xxx - same result), even though AppKit is imported.</p>