return value;
        }
        return getVirtualHostHeaders();
    }

    @SuppressWarnings("unchecked")
    default Tuple3<String, String, String>[] getVirtualHosts() {
        Tuple3<String, String, String>[] hosts = (Tuple3<String, String, String>[]) propMap.get(VIRTUAL_HOST_HEADERS);
        if (hosts == null) {

        putResultDataBody(dataMap, fessConfig.getIndexFieldRole(), roleTypeList);
        // virtualHosts
        putResultDataBody(dataMap, fessConfig.getIndexFieldVirtualHost(),
                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // id
        putResultDataBody(dataMap, fessConfig.getIndexFieldId(), crawlingInfoHelper.generateId(dataMap));
        // parentId