Bon Pasku!
What exactly fails? What language ar eyuo using, Swift or Oxygene? My git feeling is you need to find the right “real” name for buildMenu(with:) when implementing that method. Look at there Objective-C does for this.
Did I mention I hate how (a) Swift renames everything and (b) as a result, all online tutorials are ow becoming useless for anyone who wants to know what stuff is really called? 