try {
            java.lang.reflect.Method method =
                    QueryHelper.class.getDeclaredMethod("createFieldSortBuilder", String.class, org.opensearch.search.sort.SortOrder.class);
            method.setAccessible(true);

            org.opensearch.search.sort.SortBuilder<?> result = (org.opensearch.search.sort.SortBuilder<?>) method.invoke(queryHelper,
                    "timestamp", org.opensearch.search.sort.SortOrder.DESC);