code: def find_handler(
          self, request: httputil.HTTPServerRequest, **kwargs: Any
      ) -> Optional[httputil.HTTPMessageDelegate]:
          
          raise NotImplementedError()
docs: Must be implemented to return an appropriate instance of `~.httputil.HTTPMessageDelegate`
          that can serve the request.
          Routing implementations may pass additional kwargs to extend the routing logic.
  
          :arg httputil.HTTPServerRequest request: current HTTP request.
          :arg kwargs: additional keyword arguments passed by routing implementation.
          :returns: an instance of `~.httputil.HTTPMessageDelegate` that will be used to
              process the request.