@Override
    public void write(JmeExporter exporter) throws IOException {
        super.write(exporter);
        OutputCapsule capsule = exporter.getCapsule(this);
        //capsule.write(currentNumInstances, "cur_num_instances", 1);
        capsule.write(geometries, "geometries", null);
    }
Called internally by com.jme3.util.clone.Cloner.  Do not call directly.
jme3-core/src/main/java/com/jme3/scene/instancing/InstancedGeometry.java