}
            return null;
        }
    }

    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public ActionResponse download(final String id) {
        if (stream(fessConfig.getIndexBackupAllTargets()).get(stream -> stream.anyMatch(s -> s.equals(id)))) {
            if ("system.properties".equals(id)) {
                return asStream(id).contentTypeOctetStream().stream(out -> {