code: def device_message(device,
                     code,
                     ts=None,
                     origin=None,
                     type=None,
                     severity=None,
                     title=None,
                     description=None,
                     hint=None,
                     **metaData):
      # pylint: disable=redefined-builtin, too-many-arguments
      
      if ts is None:
          ts = local_now()
      payload = MessagePayload(device=device)
      payload.messages.append(
          Message(
              code=code,
              ts=ts,
              origin=origin,
              type=type,
              severity=severity,
              title=title,
              description=description,
              hint=hint,
              **metaData))
      return dumps(payload)
docs: This quickly builds a time-stamped message. If `ts` is None, the
      current time is used.