code: def version_info(self):
          
          if self._api_version is None:
              self.query_api_version()
          return self._api_version['api-major-version'],\
              self._api_version['api-minor-version']
docs: Returns API version information for the HMC.
  
          This operation does not require authentication.
  
          Returns:
  
            :term:`HMC API version`: The HMC API version supported by the HMC.
  
          Raises:
  
            :exc:`~zhmcclient.HTTPError`
            :exc:`~zhmcclient.ParseError`
            :exc:`~zhmcclient.ConnectionError`