* @return the protected words file if found
     */
    public OptionalEntity<ProtwordsFile> getProtwordsFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(ProtwordsFile.class::isInstance)
                .map(file -> OptionalEntity.of((ProtwordsFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

        form.dictId = dictId;
        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);

                                    <label for="protwordsFile" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_protwords_file"/></label>
                                    <div class="col-sm-9">
                                        <input type="file" id="protwordsFile" name="protwordsFile" class="form-control-file"/>
                                    </div>

    /**
     * The multipart file containing the protected words to be uploaded.
     * This file should contain a list of words that should be protected from stemming.
     */
    @Required
    public MultipartFormFile protwordsFile;

    /**
     * Default constructor for UploadForm.
     * Creates a new instance with default values.
     */
    public UploadForm() {
        // Default constructor
    }

        dictionaryManager.addCreator(this);
    }

    @Override
    protected DictionaryFile<? extends DictionaryItem> newDictionaryFile(final String id, final String path, final Date timestamp) {
        return new ProtwordsFile(id, path, timestamp).manager(dictionaryManager);
    }