return convertEmptyToNull(city);
    }

    public void setCity(String value) {
        registerModifiedProperty("city");
        this.city = value;
    }

    public String getDepartmentNumber() {
        checkSpecifiedProperty("departmentNumber");
        return convertEmptyToNull(departmentNumber);
    }

    public void setDepartmentNumber(String value) {

                        .forEach(v -> modifyDeleteEntry(modifyList, attrPreferredLanguage, v)));
        final String attrDepartmentNumber = fessConfig.getLdapAttrDepartmentNumber();
        OptionalUtil.ofNullable(user.getDepartmentNumber()).filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrDepartmentNumber, s))
                .orElse(() -> getAttributeValueList(result, attrDepartmentNumber).stream()

        setupEpg(_epgMap, et -> ((User) et).getCity(), (et, vl) -> ((User) et).setCity(DfTypeUtil.toString(vl)), "city");
        setupEpg(_epgMap, et -> ((User) et).getDepartmentNumber(), (et, vl) -> ((User) et).setDepartmentNumber(DfTypeUtil.toString(vl)),
                "departmentNumber");