(et, vl) -> ((BoostDocumentRule) et).setUpdatedTime(DfTypeUtil.toLong(vl)), "updatedTime");
        setupEpg(_epgMap, et -> ((BoostDocumentRule) et).getUrlExpr(),
                (et, vl) -> ((BoostDocumentRule) et).setUrlExpr(DfTypeUtil.toString(vl)), "urlExpr");
    }

    @Override
    public PropertyGateway findPropertyGateway(final String prop) {
        return doFindEpg(_epgMap, prop);
    }