public OptionalEntity<StopwordsFile> getStopwordsFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId).filter(StopwordsFile.class::isInstance)
                .map(file -> OptionalEntity.of((StopwordsFile) file)).orElse(OptionalEntity.empty());
    }

    public OptionalEntity<StopwordsItem> getStopwordsItem(final String dictId, final long id) {
        return getStopwordsFile(dictId).map(file -> file.get(id).get());

            op.setup(form -> {
                form.dictId = dictId;
            });
        }).renderWith(data -> {
            stopwordsService.getStopwordsFile(dictId).ifPresent(file -> {
                RenderDataUtil.register(data, "path", file.getPath());
            }).orElse(() -> {

    public JsonResponse<ApiResult> post$upload(final String dictId, final UploadForm form) {
        form.dictId = dictId;
        validateApi(form, messages -> {});
        final StopwordsFile file = stopwordsService.getStopwordsFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadStopwordsFile(GLOBAL));
            return null;
        });