docs: def _make_passage_kwargs(urn, reference):
      """ Little helper used by CapitainsCtsPassage here to comply with parents args
  
      :param urn: URN String
      :param reference: Reference String
      :return: Dictionary of arguments with URN based on identifier and reference
      """
      kwargs = {}
      if urn is not None:
          if reference is not None:
              kwargs["urn"] = URN("{}:{}".format(urn.upTo(URN.VERSION), reference))
          else:
              kwargs["urn"] = urn
      return kwargs