@Override
    public void cloneFields(Cloner cloner, Object original) {
        translations = cloner.clone(translations);
        rotations = cloner.clone(rotations);
        scales = cloner.clone(scales);
        trackSpatial = cloner.clone(trackSpatial);
        times = cloner.clone(times);
    }
Callback from {@link com.jme3.util.clone.Cloner} to convert this
shallow-cloned track into a deep-cloned one, using the specified cloner
to resolve copied fields.

@param cloner the cloner currently cloning this control (not null)
@param original the track from which this track was shallow-cloned
(unused)
jme3-core/src/main/java/com/jme3/animation/SpatialTrack.java