docs: def get_pyxb_binding_by_api_version(api_major, api_minor=0):
      """Map DataONE API version tag to PyXB binding.
  
      Given a DataONE API major version number, return PyXB binding that can
      serialize and deserialize DataONE XML docs of that version.
  
      Args:
        api_major, api_minor: str or int
          DataONE API major and minor version numbers.
  
          - If ``api_major`` is an integer, it is combined with ``api_minor`` to form an
            exact version.
  
          - If ``api_major`` is a string of ``v1`` or ``v2``, ``api_minor`` is ignored
            and the latest PyXB bindingavailable for the ``api_major`` version is
            returned.
  
      Returns:
        PyXB binding: E.g., ``d1_common.types.dataoneTypes_v1_1``.
  
      """
      try:
          return VERSION_TO_BINDING_DICT[api_major, api_minor]
      except KeyError:
          raise ValueError(
              'Unknown DataONE API version: {}.{}'.format(api_major, api_minor)
          )