-class Q_WAYLAND_CLIENT_EXPORT QWaylandWindowManagerIntegration : public QObject, public QGenericUnixServices, public QtWayland::qt_windowmanager
+class Q_WAYLAND_CLIENT_EXPORT QWaylandWindowManagerIntegration : public QObject, public QGenericUnixServices, public QtWayland::qt_windowmanager, public QWaylandRegistryObserver