}

    public void setDisplayName(String value) {
        registerModifiedProperty("displayName");
        this.displayName = value;
    }

    public String getEmployeeNumber() {
        checkSpecifiedProperty("employeeNumber");
        return convertEmptyToNull(employeeNumber);
    }

    public void setEmployeeNumber(String value) {

        final String attrEmployeeNumber = fessConfig.getLdapAttrEmployeeNumber();
        OptionalUtil.ofNullable(user.getEmployeeNumber()).filter(StringUtil::isNotBlank)
                .ifPresent(s -> modifyReplaceEntry(modifyList, attrEmployeeNumber, s))
                .orElse(() -> getAttributeValueList(result, attrEmployeeNumber).stream()

        setupEpg(_epgMap, et -> ((User) et).getDisplayName(), (et, vl) -> ((User) et).setDisplayName(DfTypeUtil.toString(vl)),
                "displayName");
        setupEpg(_epgMap, et -> ((User) et).getEmployeeNumber(), (et, vl) -> ((User) et).setEmployeeNumber(DfTypeUtil.toString(vl)),
                "employeeNumber");