LOG.debug("Document metadata stored to " + StorageAddress.toString(doc.getAddress()));
			public Object start() throws ReadOnlyException {				if (doc.getAddress() > -1) {					domDb.remove(doc.getAddress());				}				doc.setAddress(domDb.add(data));//				LOG.debug("Document metadata stored to " + StorageAddress.toString(doc.getAddress()));				return null;			}