// but we can verify the class structure
        assertNotNull(crawlerLogHelper);
        assertTrue(CrawlerLogHelper.class.getSuperclass().getSimpleName().contains("LogHelper"));
    }

                if (lastModified == null) {
                    return true;
                }
                urlQueue.setLastModified(lastModified.getTime());
                log(logHelper, LogType.CHECK_LAST_MODIFIED, crawlerContext, urlQueue);

                if (responseData == null) {
                    // head method