@Override
    public Map getExportedCustomDirectEventTypeConstants() {
        return MapBuilder.of(
                ViroEvents.ON_EXIT_VIRO, MapBuilder.of("registrationName", ViroEvents.ON_EXIT_VIRO));
    }
SceneNavigatorManager for building a {@link VRTVRSceneNavigator}
corresponding to the ViroSceneNavigator.js control.
android/viro_bridge/src/main/java/com/viromedia/bridge/component/VRTSceneNavigatorManager.java