docs: def odinweb_node_formatter(path_node):
          # type: (PathParam) -> str
          """
          Format a node to be consumable by the `UrlPath.parse`.
          """
          args = [path_node.name]
          if path_node.type:
              args.append(path_node.type.name)
          if path_node.type_args:
              args.append(path_node.type_args)
          return "{{{}}}".format(':'.join(args))