public SurveyCompletionList getSurveyCompletions(String asSurveyId, String asRegId) {
        String lsParam = "";
        if (UtilityMethods.isValidString(asSurveyId)) {
            lsParam += asSurveyId;
        }

        if (UtilityMethods.isValidString(asRegId)) {
            lsParam += "/" + asRegId;
        }

        return get(SurveyCompletionList.class, REST_URL_SURVEY_COMPLETION + lsParam);
    }