if (address > -1)
if (address > -1) {
			public Object start() {				long address = previous.getInternalAddress();				if (address > -1)					address = domDb.insertAfter(doc, address, data);				else {					NodeRef ref = new NodeRef(doc.getDocId(), previous.getGID());					address = domDb.insertAfter(doc, ref, data);				}				node.setInternalAddress(address);				return null;			}