return findStudentTestQuestions(question.getStudentTestsQuestionsSet(), distributedTest);
return findStudentTestQuestions(registration.getStudentTestsQuestionsSet(), distributedTest);
    public static Set<StudentTestQuestion> findStudentTestQuestions(final Question question,            final DistributedTest distributedTest) {        return findStudentTestQuestions(question.getStudentTestsQuestionsSet(), distributedTest);    }