code: def cancel_notification(cls, notification_or_id, tag=None):
          
          def on_ready(mgr):
              if isinstance(notification_or_id, JavaBridgeObject):
                  nid = notification_or_id.__id__
              else:
                  nid = notification_or_id
              if tag is None:
                  mgr.cancel_(nid)
              else:
                  mgr.cancel(tag, nid)
          cls.get().then(on_ready)
docs: Cancel the notification.
           
          Parameters
          ----------
          notification_or_id: Notification.Builder or int
              The notification or id of a notification to clear
          tag: String
              The tag of the notification to clear