gio:application-send-notification (application id notification)

application -- a g:application instance
id -- a string for the ID of the notification, or nil
notification -- a g:notification instance to send

Sends a notification on behalf of the application to the desktop shell. There is no guarantee that the notification is displayed immediately, or even at all. Notifications may persist after the application exits. It will be D-Bus activated when the notification or one of its actions is activated. Modifying notification after this call has no effect. However, the object can be reused for a later call to this function. The id argument may be any string that uniquely identifies the event for the application. It does not need to be in any special format. For example, "new-message" might be appropriate for a notification about new messages. If a previous notification was sent with the same id, it will be replaced with notification and shown again as if it was a new notification. This works even for notifications sent from a previous execution of the application, as long as id is the same string. The id argument may be nil, but it is impossible to replace or withdraw notifications without an ID.

If the notification is no longer relevant, it can be withdrawn with the g:application-withdraw-notification function.