super.setUp();
    }

    public void test_getContent() {
        DocumentHelper documentHelper = new DocumentHelper();

        ResponseData responseData = new ResponseData();
        Map<String, Object> dataMap = new HashMap<>();
        assertEquals("", documentHelper.getContent(null, responseData, null, dataMap));
        assertEquals("", documentHelper.getContent(null, responseData, "", dataMap));

    }


    @Override
    public Object getContent () throws IOException {
        handshake();
        return this.connection.getContent();
    }


    @Override
    public Object getContent ( Class[] classes ) throws IOException {
        handshake();
        return this.connection.getContent(classes);
    }


    @Override

    }

    public Object getContent() throws IOException {
        try {
            handshake();
        } catch (IOException ex) { }
        return connection.getContent();
    }

    public Object getContent(Class[] classes) throws IOException {
        try {
            handshake();
        } catch (IOException ex) { }
        return connection.getContent(classes);
    }

                .header("Accept", "application/json").execute()) {
            final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
            if (logger.isDebugEnabled()) {
                logger.debug("response: {}", contentMap);
            }
            if (contentMap.containsKey("value")) {

        try (final InputStream in = responseData.getResponseBody()) {
            final ExtractData extractData = getExtractData(extractor, in, createExtractParams(responseData, crawlingConfig));
            content = extractData.getContent();
            if (fessConfig.isCrawlerDocumentFileIgnoreEmptyContent() && StringUtil.isBlank(content)) {
                return null;
            }
            if (getLogger().isDebugEnabled()) {

        }
        return type.getNameAsString();
    }

    private String getJavadocComment(NodeWithJavadoc<?> node) {
        return node.getJavadocComment().map(Comment::getContent).orElse("");
    }

    //                                       ---------------
    protected final Map<String, PropertyGateway> _epgMap = newHashMap();
    {
        setupEpg(_epgMap, et -> ((RelatedContent) et).getContent(), (et, vl) -> ((RelatedContent) et).setContent(DfTypeUtil.toString(vl)),
                "content");
        setupEpg(_epgMap, et -> ((RelatedContent) et).getCreatedBy(),

        } catch (final IOException e) {
            return StringUtil.EMPTY; // empty
        }
    }

    public String getContent(final CrawlingConfig crawlingConfig, final ResponseData responseData, final String content,
            final Map<String, Object> dataMap) {
        if (content == null) {
            return StringUtil.EMPTY; // empty

        get() = receiverTypeReference?.text

    private
    val KtNamedDeclaration.sinceVersion: String
        get() = docComment?.getDefaultSection()?.findTagsByName("since")?.singleOrNull()?.getContent()
            ?: versionNotFound

            final CrawlingConfig crawlingConfig, final DocumentHelper documentHelper, final String body, final String fileName) {
        final String content = documentHelper.getContent(crawlingConfig, responseData, body, dataMap);
        if (StringUtil.isNotBlank(fileName) && fessConfig.isCrawlerDocumentAppendFilename()) {