if (viewHelper != null && !docMap.isEmpty()) {
                        docMap.put(fessConfig.getResponseFieldContentTitle(), viewHelper.getContentTitle(docMap));
                        docMap.put(fessConfig.getResponseFieldContentDescription(), viewHelper.getContentDescription(docMap));

        split(fessConfig.getResponseInlineMimetypes(), ",")
                .of(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).forEach(inlineMimeTypeSet::add));
    }

    public String getContentTitle(final Map<String, Object> document) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        String title = DocumentUtil.getValue(document, fessConfig.getIndexFieldTitle(), String.class);