docs: def traverse(path, request, resource):
      """
      Traverse a root resource, retrieving the appropriate child for the request.
  
      """
  
      path = path.lstrip(b"/")
      for component in path and path.split(b"/"):
          if getattr(resource, "is_leaf", False):
              break
          resource = resource.get_child(name=component, request=request)
      return resource