public boolean isInitialized(){
        return initialized;
    }
Check if the VR environment is initialized. A call to the {@link #initialize() initialize()} method should set this value to <code>true</code>
@return <code>true</code> if the VR environment is initialized and <code>false</code> otherwise.
jme3-vr/src/main/java/com/jme3/app/VREnvironment.java