get_startup_notification_id
Description:
[ Version ( deprecated = true ,  deprecated_since = "4.10." ) ]
public unowned string? get_startup_notification_id ()
  public unowned string? get_startup_notification_id ()
Warning: get_startup_notification_id is deprecated since 4.10..
Gets the startup notification ID for a Wayland display, or `NULL` if no ID has been defined.
Parameters:
| this | a display | 
Returns:
| the startup notification ID for this |