title: Using undocumented classes such as NSPreferences in Mac App Store
body: <p>There is an undocumented class called <a href="http://cocoadev.com/index.pl?NSPreferences" rel="nofollow"><code>NSPreferences</code></a> that appears to be used by Safari and Mail, and eases creation of multipage preference pages. </p>
  
  <p>Has anyone had experience using <code>NSPreferences</code> or similar undocumented, but useful and fun, features in an application submitted to Mac App Store?</p>