@Override
    public void cloneFields(Cloner cloner, Object original) {
        this.spatial = cloner.clone(spatial);
    }
To be implemented in subclass.

@param rm the RenderManager rendering the controlled Spatial (not null)
@param vp the ViewPort being rendered (not null)
jme3-core/src/main/java/com/jme3/scene/control/AbstractControl.java