docs: def _validate_message(self, message):
          """Validate XML response from iLO.
  
          This function validates the XML response to see
          if the exit status is 0 or not in the response.
          If the status is non-zero it raises exception.
          """
          if message.tag != 'RIBCL':
              # the true case shall be unreachable for response
              # XML from Ilo as all messages are tagged with RIBCL
              # but still raise an exception if any invalid
              # XML response is returned by Ilo. Set status to some
              # arbitary non-zero value.
              status = -1
              raise exception.IloClientInternalError(message, status)
  
          for child in message:
              if child.tag != 'RESPONSE':
                  return message
              status = int(child.get('STATUS'), 16)
              msg = child.get('MESSAGE')
              if status == 0 and msg != 'No error':
                  return msg
              if status != 0:
                  if 'syntax error' in msg or 'Feature not supported' in msg:
                      for cmd in BOOT_MODE_CMDS:
                          if cmd in msg:
                              platform = self.get_product_name()
                              msg = ("%(cmd)s is not supported on %(platform)s" %
                                     {'cmd': cmd, 'platform': platform})
                              LOG.debug(self._("Got invalid response with "
                                               "message: '%(message)s'"),
                                        {'message': msg})
                              raise (exception.IloCommandNotSupportedError
                                     (msg, status))
                      else:
                          LOG.debug(self._("Got invalid response with "
                                           "message: '%(message)s'"),
                                    {'message': msg})
                          raise exception.IloClientInternalError(msg, status)
                  if (status in exception.IloLoginFailError.statuses or
                          msg in exception.IloLoginFailError.messages):
                      LOG.debug(self._("Got invalid response with "
                                       "message: '%(message)s'"),
                                {'message': msg})
                      raise exception.IloLoginFailError(msg, status)
  
                  LOG.debug(self._("Got invalid response with "
                                   "message: '%(message)s'"),
                            {'message': msg})
                  raise exception.IloError(msg, status)