public Set<String> findResponses() { final Set<String> responses = new HashSet<String>();
public Set<Response> findResponses() { final Set<Response> responses = new HashSet<Response>(); for (final StudentTestQuestion studentTestQuestion : getDistributedTestQuestionsSet()) { if (studentTestQuestion.getResponse() != null) { responses.add(studentTestQuestion.getResponse()); } }
    public Set<String> findResponses() {        final Set<String> responses = new HashSet<String>();//        for (final StudentTestQuestion studentTestQuestion : getDistributedTestQuestionsSet()) {//            if (studentTestQuestion.getResponse() != null) {//                responses.add(studentTestQuestion.getResponse());//            }//        }        return responses;    }