if (uniqueId == null || uniqueIdToBugInstanceMap.get(uniqueId) != null) {
if (uniqueId == null)  {
	private void registerUniqueId(BugInstance bugInstance) {		// If the BugInstance has no unique id, generate one.		// If the BugInstance has a unique id which conflicts with		// an existing BugInstance, then we also generate a new		// unique id.		String uniqueId = bugInstance.getUniqueId();		if (uniqueId == null || uniqueIdToBugInstanceMap.get(uniqueId) != null) {			uniqueId = assignUniqueId(bugInstance);		}		uniqueIdToBugInstanceMap.put(uniqueId, bugInstance);	}