List<ExamCoordinator> coordinators = group.getExamCoordinators();
List<ExamCoordinator> coordinators = new ArrayList<ExamCoordinator>(group.getExamCoordinators());
    public Object provide(Object source, Object currentValue) {        VigilantGroupBean bean = (VigilantGroupBean) source;        VigilantGroup group = bean.getSelectedVigilantGroup();        List<ExamCoordinator> coordinators = group.getExamCoordinators();        Collections.sort(coordinators, new BeanComparator("person.name"));        return coordinators;    }