code: def include(self, location, namespace=None, app_name=None):
          
          sorted_entries = sorted(self.routes, key=operator.itemgetter(0),
                                  reverse=True)
  
          arg = [u for _, u in sorted_entries]
          return url(location, urls.include(
              arg=arg,
              namespace=namespace,
              app_name=app_name))
docs: Return an object suitable for url_patterns.
  
          :param location: root URL for all URLs from this router
          :param namespace: passed to url()
          :param app_name: passed to url()