title: NSOutlineView example
body: <p>Please, could you give a simple complete example of Cocoa application with NSOutlineView with hierarchical data representation not so ambiguous like <a href="https://stackoverflow.com/questions/1170514/nsoutlineview-and-nstreecontroller-example">NSOutlineView and NSTreeController example</a>
  .</p>
  
  <p>Thanks!</p>