return OptionalEntity.of(list.get(0));
    }

    /**
     * Stores a file configuration in the database.
     * This method encrypts the configuration parameters before saving and
     * performs an insert or update operation based on whether the configuration exists.
     *
     * @param fileConfig the file configuration to be stored
     */
    public void store(final FileConfig fileConfig) {

        User appliedUser;
        String changePasswordUsername;
        String changePasswordPassword;
        boolean changePasswordResult = false;

        @Override
        public void insert(User user) {
            insertCalled = true;
            insertedUser = user;
        }

        @Override
        public void delete(User user) {
            deleteCalled = true;

        return userInfoBhv.selectByPK(userCode).map(userInfo -> {
            final FavoriteLog favoriteLog = new FavoriteLog();
            favoriteLogLambda.accept(userInfo, favoriteLog);
            favoriteLogBhv.insert(favoriteLog);
            if (fessConfig.isLoggingSearchUseLogfile()) {
                ComponentUtil.getSearchLogHelper().writeSearchLogEvent(favoriteLog);
            }
            return true;
        }).orElse(false);

        return requestHeaderBhv.selectByPK(id);
    }

    /**
     * Stores a request header configuration to the database.
     * This method performs either insert or update based on whether the request header already exists.
     *
     * @param requestHeader the request header configuration to store
     */
    public void store(final RequestHeader requestHeader) {

   *       be checked to be equal to the instance before serialization.
   *   <li>If {@code C} doesn't explicitly implement {@code equals} but instead inherits it from a
   *       superclass, no equality check is done on the deserialized instance because it's not clear
   *       whether the author intended for the class to be a value type.

        sb.append(dm).append(updatedTime);
        sb.append(dm).append(username);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        sb.append(dm).append(username);
        sb.append(dm).append(webConfigId);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

    public String xgetLocationBase() {
        final StringBuilder sb = new StringBuilder();
        ConditionQuery query = this;
        while (true) {
            if (query.isBaseQuery()) {
                sb.insert(0, CQ_PROPERTY + ".");
                break;
            } else {
                final String foreignPropertyName = query.xgetForeignPropertyName();
                if (foreignPropertyName == null) {

    public String xgetLocationBase() {
        final StringBuilder sb = new StringBuilder();
        ConditionQuery query = this;
        while (true) {
            if (query.isBaseQuery()) {
                sb.insert(0, CQ_PROPERTY + ".");
                break;
            } else {
                final String foreignPropertyName = query.xgetForeignPropertyName();
                if (foreignPropertyName == null) {

### Create an `Enum` class { #create-an-enum-class }

Import `Enum` and create a sub-class that inherits from `str` and from `Enum`.

By inheriting from `str` the API docs will be able to know that the values must be of type `string` and will be able to render correctly.