code: def rebuild_tree(self, request):
          '''
          Rebuilds the tree and clears the cache.
          '''
          self.model.objects.rebuild()
          self.message_user(request, _('Menu Tree Rebuilt.'))
          return self.clean_cache(requestf rebuild_tree(self, request):
          '''
          Rebuilds the tree and clears the cache.
          '''
          self.model.objects.rebuild()
          self.message_user(request, _('Menu Tree Rebuilt.'))
          return self.clean_cache(request)
docs: Rebuilds the tree and clears the cache.