code: def send_notification(
          self, model, priority="warning", icon_type=None, lifetime=None
      ):
          
          assert(priority in ("info", "warning", "critical"))
          assert(icon_type in (None, "none", "info", "alert"))
          assert((lifetime is None) or (lifetime > 0))
  
          log.debug("sending notification...")
  
          cmd, url = DEVICE_URLS["send_notification"]
  
          json_data = {"model": model.json(), "priority": priority}
  
          if icon_type is not None:
              json_data["icon_type"] = icon_type
          if lifetime is not None:
              json_data["lifetime"] = lifetime
  
          return self._exec(cmd, url, json_data=json_data)
docs: sends new notification to the device
  
          :param Model model: an instance of the Model class that should be used
          :param str priority: the priority of the notification
                               [info, warning or critical] (default: warning)
          :param str icon_type: the icon type of the notification
                                [none, info or alert] (default: None)
          :param int lifetime: the lifetime of the notification in ms
                               (default: 2 min)