code: def render_applicationNavigation(self, ctx, data):
          
          if self.username is None:
              return ''
          translator = self._getViewerPrivateApplication()
          return applicationNavigation(
              ctx,
              translator,
              translator.getPageComponents().navigation)
docs: For authenticated users, add primary application navigation to the
          given tag.  For unauthenticated users, remove the given tag from the
          output.
  
          @see L{xmantissa.webnav.applicationNavigation}