docs: def get_allowed_operations(resource, subresouce_path):
      """Helper function to get the HTTP allowed methods.
  
      :param resource: ResourceBase instance from which the path is loaded.
      :param subresource_path: JSON field to fetch the value from.
              Either a string, or a list of strings in case of a nested field.
      :returns: A list of allowed HTTP methods.
      """
      uri = get_subresource_path_by(resource, subresouce_path)
      response = resource._conn.get(path=uri)
      return response.headers['Allow']