* message: Failed to upload a protwords file.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsFailedToUploadProtwordsFile(String property) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_failed_to_upload_protwords_file));
        return this;
    }

    /**

        validateApi(form, messages -> {});
        final KuromojiFile file = kuromojiService.getKuromojiFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.kuromojiFile.getInputStream()) {
            file.update(inputStream);
        } catch (final IOException e) {

        validateApi(form, messages -> {});
        final ProtwordsFile file = protwordsService.getProtwordsFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.protwordsFile.getInputStream()) {
            file.update(inputStream);
        } catch (final IOException e) {

                file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);
                throwValidationError(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL),
                        () -> redirectWith(getClass(), moreUrl("uploadpage/" + form.dictId)));
            }
            saveInfo(messages -> messages.addSuccessUploadProtwordsFile(GLOBAL));

        validateApi(form, messages -> {});
        final StemmerOverrideFile file = stemmerOverrideService.getStemmerOverrideFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.stemmerOverrideFile.getInputStream()) {
            file.update(inputStream);

        validateApi(form, messages -> {});
        final CharMappingFile file = charMappingService.getCharMappingFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.charMappingFile.getInputStream()) {
            file.update(inputStream);
        } catch (final IOException e) {

        validateApi(form, messages -> {});
        final SynonymFile file = synonymService.getSynonymFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.synonymFile.getInputStream()) {
            file.update(inputStream);
        } catch (final IOException e) {