IRole mostImportantRole = getMostImportantRole(person.getPersonRoles(), rolesImportance);
IRole mostImportantRole = getMostImportantRole(person.getPersonRoles());
	public static String updateUsername(IPerson person,			List<RoleType> rolesImportance) {		IRole mostImportantRole = getMostImportantRole(person.getPersonRoles(),				rolesImportance);		if (mostImportantRole == null) {			return person.getUsername();		}		return generateNewUsername(person.getUsername(), mostImportantRole				.getRoleType(), person);	}