code: def route(self):
          '''The relative :class:`.Route` served by this
          :class:`Router`.
          '''
          parent = self._parent
          if parent and parent._route.is_leaf:
              return parent.route + self._route
          else:
              return self._routf route(self):
          '''The relative :class:`.Route` served by this
          :class:`Router`.
          '''
          parent = self._parent
          if parent and parent._route.is_leaf:
              return parent.route + self._route
          else:
              return self._route
docs: The relative :class:`.Route` served by this
          :class:`Router`.