*
     * @return HTML response redirecting to the index page
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse deleteDocumentWords() {
        if (!suggestHelper.deleteDocumentWords()) {
            throwValidationError(messages -> messages.addErrorsFailedToDeleteDocInAdmin(GLOBAL),
                    () -> asHtml(path_AdminSuggest_AdminSuggestJsp).useForm(SuggestForm.class));

     * Deletes all document-based words from the suggest index.
     *
     * @return true if the operation was successful, false otherwise.
     */
    public boolean deleteDocumentWords() {
        final SuggestDeleteResponse response = suggester.indexer().deleteDocumentWords();
        if (response.hasError()) {
            logger.warn("Failed to delete document words.", response.getErrors().get(0));
            return false;
        }

        } catch (Exception e) {
            assertTrue(true);
        }
    }

    public void test_deleteDocumentWords() {
        try {
            assertFalse(suggestHelper.deleteDocumentWords());
        } catch (Exception e) {
            assertTrue(true);
        }
    }

    public void test_deleteQueryWords() {
        try {
            assertFalse(suggestHelper.deleteQueryWords());

     *
     * @return JSON response indicating success or failure
     */
    // DELETE /api/admin/suggest/document
    @Execute
    public JsonResponse<ApiResult> delete$document() {
        if (!suggestHelper.deleteDocumentWords()) {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToDeleteDocInAdmin(GLOBAL));
        }
        return asJson(new ApiResult.ApiResponse().status(ApiResult.Status.OK).result());
    }