}
    public void setModelBound(BoundingVolume v) {        for (int i = 0; i < this.getQuantity(); i++) {            if (this.getChild(i) instanceof TerrainPage) {                ((TerrainPage) getChild(i)).setModelBound((BoundingVolume) v                        .clone(null));            } else if (this.getChild(i) instanceof TerrainBlock) {                ((TerrainBlock) getChild(i)).setModelBound((BoundingVolume) v                        .clone(null));            }        }    }