stream(searchLog.getRoles()).of(stream -> stream.forEach(role -> roles.add(role)));
                if (fessConfig.isValidSearchLogPermissions(roles.toArray(new String[roles.size()]))) {
                    suggester.indexer().indexFromSearchWord(sb.toString(), fields.toArray(new String[fields.size()]),

                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotBlank).toArray(n -> new String[n]));
    }

    String getSuggestSearchLogPermissions();

    default boolean isValidSearchLogPermissions(final String[] permissions) {
        if (permissions == null) {
            return false;
        }
        @SuppressWarnings("unchecked")