if (address == BFile.UNKNOWN_ADDRESS) LOG.warn("address is missing");  node.setInternalAddress(address); ByteArrayPool.releaseByteArray(data); return null; }
            public Object start() throws ReadOnlyException {                long address = BFile.UNKNOWN_ADDRESS;                final byte data[] = node.serialize();                if (nodeType == Node.TEXT_NODE                    || nodeType == Node.ATTRIBUTE_NODE                    || doc.getTreeLevel(gid) > depth)                    address = domDb.add(transaction, data);                else {                    address = domDb.put(transaction, new NodeRef(doc.getDocId(), node.getNodeId()), data);                }                if (address == BFile.UNKNOWN_ADDRESS)                    LOG.warn("address is missing");                //TODO : how can we continue here ? -pb                node.setInternalAddress(address);                ByteArrayPool.releaseByteArray(data);                return null;            }