docs: def pyxb_is_v1(pyxb_obj):
      """
    Args:
      pyxb_obj : PyXB object
        PyXB object holding an unknown type.
  
    Returns:
      bool: **True** if ``pyxb_obj`` holds an API v1 type.
    """
      # TODO: Will not detect v1.2 as v1.
      return (
          pyxb_obj._element().name().namespace()
          == d1_common.types.dataoneTypes_v1.Namespace
      )