code: public Stream<LsQuestion> getQuestionsFromGroup(int surveyId, int groupId) throws LimesurveyRCException {
          LsApiBody.LsApiParams params = getParamsWithKey(surveyId);
          params.setGroupId(groupId);
          JsonElement result = callRC(new LsApiBody("list_questions", params));
          List<LsQuestion> questions = gson.fromJson(result, new TypeToken<List<LsQuestion>>() {
          }.getType());
  
          return questions.stream().sorted(Comparator.comparing(LsQuestion::getOrder));
      }
docs: Gets questions from a group.
  The questions are ordered using the "question_order" field.
  
  @param surveyId the survey id you want to get the questions
  @param groupId  the group id you want to get the questions
  @return a stream of questions in an ordered order
  @throws LimesurveyRCException the limesurvey rc exception