* message: Failed to download the Protwords file.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsFailedToDownloadProtwordsFile(String property) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_failed_to_download_protwords_file));
        return this;
    }

    /**