@Override
                public void run() {
                    final VRT3DSceneNavigator sceneNav = navigatorWeakReference.get();
                    sceneNav.mGLInitialized = true;
                    sceneNav.setViroContext();
                }
VRT3DSceneNavigator manages the various scenes{@link ViroViewScene} that a Viro App can navigate between.
android/viro_bridge/src/main/java/com/viromedia/bridge/component/VRT3DSceneNavigator.java