code: func (rm *RouteManager) Load(persistor RouteStore) error {
  	routes, err := persistor.GetAll()
  	if err != nil {
  		return err
  	}
  	for _, route := range routes {
  		rm.Add(route)
  	}
  	rm.persistor = persistor
  	return nil
  }
docs: // Load loads all route from a RouteStore