QGuiApplication::sync() is missing when QT_NO_SESSIONMANGER is set

3280 void QGuiApplication::sync()
3281 {
3282     QCoreApplication::processEvents();
3283     if (QGuiApplicationPrivate::platform_integration
3284             && QGuiApplicationPrivate::platform_integration->hasCapability(QPlatformIntegration::SyncState)) {
3285         QGuiApplicationPrivate::platform_integration->sync();
3286         QCoreApplication::processEvents();
3287         QWindowSystemInterface::flushWindowSystemEvents();
3288     }
3289 }
3290 
3291 void QGuiApplicationPrivate::commitData()
3292 {
3293     Q_Q(QGuiApplication);
3294     is_saving_session = true;
3295 
3296     emit q->commitDataRequest(*session_manager);
3297     if (is_fallback_session_management_enabled && session_manager->allowsInteraction()
3298         && !tryCloseAllWindows()) {
3299         session_manager->cancel();
3300     }
3301 
3302     is_saving_session = false;
3303 }
3304 
3305 
3306 void QGuiApplicationPrivate::saveState()
3307 {
3308     Q_Q(QGuiApplication);
3309     is_saving_session = true;
3310     emit q->saveStateRequest(*session_manager);
3311     is_saving_session = false;
3312 }
3313 #endif //QT_NO_SESSIONMANAGER