return "title,content";
        }

        @Override
        public String getFesenType() {
            return "opensearch";
        }

        @Override
        public String getIndexDocumentSuggestIndex() {
            return "fess.suggest";
        }

        @Override
        public Integer getSuggestMinHitCountAsInteger() {
            return 1;
        }

        @Override

        settingsBuilder.searchTimeout(fessConfig.getIndexSearchTimeout());
        settingsBuilder.setSettingsIndexName(fessConfig.getIndexDocumentSuggestIndex() + "_suggest");
        suggester = Suggester.builder().settings(settingsBuilder).build(searchEngineClient, fessConfig.getIndexDocumentSuggestIndex());
        if (ComponentUtil.hasPopularWordHelper()) {
            popularWordHelper = ComponentUtil.getPopularWordHelper();
        }