@Override
    public void cloneFields(Cloner cloner, Object original) {
        indexPool = cloner.clone(indexPool);
        index = cloner.clone(index);
        array = cloner.clone(array);
    }
Callback from {@link com.jme3.util.clone.Cloner} to convert this
shallow-cloned array 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 array from which this array was shallow-cloned
(unused)
jme3-core/src/main/java/com/jme3/animation/CompactArray.java