this.doc = node.doc;
this.doc = node.getDocument();
	public NodeIterator(Object lock, DOMFile db, NodeProxy node, boolean poolable)		throws BTreeException, IOException {		this.db = db;		this.doc = node.doc;		this.useNodePool = poolable;		if (-1 < node.getInternalAddress())			startAddress = node.getInternalAddress();		else			this.node = node;		lockKey = (lock == null ? this : lock);	}