@Override
    public void write(JmeExporter ex) throws IOException {
        super.write(ex);
        OutputCapsule oc = ex.getCapsule(this);
        oc.write(shadowRenderer, "shadowRenderer", null);

    }
Enables the stabilization of the shadow's edges. (default is <code>true</code>)
This prevents shadow edges from flickering when the camera moves.
However, it can lead to some loss of shadow quality in particular scenes.

 @param stabilize <code>true</code> if the stabilization has to be enabled and <code>false</code> otherwise.
@see #isEnabledStabilization()
jme3-vr/src/main/java/com/jme3/shadow/DirectionalLightShadowFilterVR.java