code: def register_subservice(self, uri, service):
          
          found = False
  
          self.create_route(uri, True)
          self.routes[uri]['handlers'].set_subservice(service)
docs: Register a class instance to handle a URI.
  
          :param uri: string - URI for the request
          :param service: StackInABoxService object instance that handles
                          the request
  
          :returns: n/a