code: func (v *Notification) SetDefaultAction(detailedAction string) {
  	cstr1 := (*C.gchar)(C.CString(detailedAction))
  	defer C.free(unsafe.Pointer(cstr1))
  
  	C.g_notification_set_default_action(v.native(), cstr1)
  }
docs: // Only available from 2.42
  // // SetPriority is a wrapper around g_notification_set_priority().
  // func (v *Notification) SetPriority(prio NotificationPriority) {
  // 	C.g_notification_set_priority(v.native(), C.GNotificationPriority(prio))
  // }
  // SetDefaultAction is a wrapper around g_notification_set_default_action().