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

@param cloner the cloner that's cloning this action (not null)
@param original the action from which this action was shallow-cloned
(unused)
jme3-core/src/main/java/com/jme3/anim/tween/action/Action.java