* @param runtimeGroups   The runtime groups.
     * @return A new action validator.
     */
    public ActionValidator<FessMessages> createValidator(final RequestManager requestManager,
            final UserMessagesCreator<FessMessages> messagesCreator, final Class<?>[] runtimeGroups) {
        return new FessActionValidator<>(requestManager, messagesCreator, runtimeGroups);
    }

    /**