/**
	 * Nodes added.
	 *
	 * @return true, if successful
	 */
	public boolean nodesAdded() {
		return nodesDelta.added();
	}
	/**
	 * Nodes removed.
	 *
	 * @return true, if successful
	 */
	public boolean nodesRemoved() {
		return nodesDelta.removed();
	}