code: def _get_bios_boot_resource(self, data):
          
          try:
              boot_uri = data['links']['Boot']['href']
          except KeyError:
              msg = ('Boot resource not found.')
              raise exception.IloCommandNotSupportedError(msg)
  
          status, headers, boot_settings = self._rest_get(boot_uri)
  
          if status != 200:
              msg = self._get_extended_error(boot_settings)
              raise exception.IloError(msg)
  
          return boot_settings
docs: Get the Boot resource like BootSources.
  
          :param data: Existing Bios settings of the server.
          :returns: boot settings.
          :raises: IloCommandNotSupportedError, if resource is not found.
          :raises: IloError, on an error from iLO.