docs: def add_routes(fapp, routes, prefix=""):
      """Batch routes registering
  
      Register routes to a blueprint/flask_app previously collected
      with :func:`routes_collector`.
  
      :param fapp: bluprint or flask_app to whom attach new routes.
      :param routes: dict of routes collected by :func:`routes_collector`
      :param prefix: url prefix under which register all routes
      """
      for r in routes:
          r['rule'] = prefix + r['rule']
          fapp.add_url_rule(**r)