@Override
    public void write(JmeExporter ex) throws IOException {
        OutputCapsule oc = ex.getCapsule(this);
        oc.write(translations, "translations", null);
        oc.write(rotations, "rotations", null);
        oc.write(times, "times", null);
        oc.write(scales, "scales", null);
        oc.write(trackSpatial, "trackSpatial", null);
    }
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