@Override
    public void setModelBound(BoundingVolume modelBound) {
        if (children != null) {
            for (Spatial child : children.getArray()) {
                child.setModelBound(modelBound != null ? modelBound.clone(null) : null);
            }
        }
    }
Called internally by com.jme3.util.clone.Cloner.  Do not call directly.
jme3-core/src/main/java/com/jme3/scene/Node.java