.forEach(v -> modifyDeleteEntry(modifyList, attrTeletexTerminalIdentifier, v)));
        final String attrX121Address = fessConfig.getLdapAttrX121Address();
        OptionalUtil.ofNullable(user.getX121Address()).filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrX121Address, s))
                .orElse(() -> getAttributeValueList(result, attrX121Address).stream()

        return uidNumber;
    }

    public void setUidNumber(Long value) {
        registerModifiedProperty("uidNumber");
        this.uidNumber = value;
    }

    public String getX121Address() {
        checkSpecifiedProperty("x121Address");
        return convertEmptyToNull(x121Address);
    }

    public void setX121Address(String value) {
        registerModifiedProperty("x121Address");

        setupEpg(_epgMap, et -> ((User) et).getUidNumber(), (et, vl) -> ((User) et).setUidNumber(DfTypeUtil.toLong(vl)), "uidNumber");
        setupEpg(_epgMap, et -> ((User) et).getX121Address(), (et, vl) -> ((User) et).setX121Address(DfTypeUtil.toString(vl)),
                "x121Address");
    }

    @Override
    public PropertyGateway findPropertyGateway(final String prop) {