*/
    public boolean hasFailure() {
        return !failures.isEmpty();
    }

    /**
     * Returns the list of failures.
     *
     * @return a List of Throwable objects representing the failures
     */
    public List<Throwable> getFailures() {
        return failures;
    }

 * This class provides methods to add, retrieve, and manage extractors based on a key.
 * It also includes a builder for creating extractors.
 *
 * <p>
 * The factory maintains a map of keys to an array of {@link Extractor} objects.
 * When multiple extractors are associated with a single key, they are sorted by weight
 * in descending order. The {@link #getExtractor(String)} method returns a composite

    }

    /**
     * Returns a list of OpenSearchAccessResult objects.
     * @param callback The callback to build the search request.
     * @return A list of OpenSearchAccessResult objects.
     */
    public List<OpenSearchAccessResult> getAccessResultList(final Consumer<SearchRequestBuilder> callback) {

 *
 * <p>
 * The class is responsible for:
 * </p>
 * <ul>
 *   <li>Updating session IDs for URL queues.</li>
 *   <li>Adding new URLs to the queue.</li>
 *   <li>Inserting existing {@link UrlQueueImpl} objects into the queue.</li>
 *   <li>Deleting URL queues associated with a session.</li>
 *   <li>Deleting all URL queues.</li>
 *   <li>Offering a list of URLs to the queue, ensuring duplicates are not added.</li>

        return urlQueue;
    }

    /**
     * Fetches a list of URL queues for a given session ID.
     * @param sessionId The session ID.
     * @return A list of OpenSearchUrlQueue objects.
     */
    protected List<OpenSearchUrlQueue> fetchUrlQueueList(final String sessionId) {
        return getList(OpenSearchUrlQueue.class, sessionId, null, 0, pollingFetchSize,

            return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return java.util.Objects.hash(loc, changefreq, lastmod, priority);
    }

    /**
     * Returns a string representation of this SitemapUrl.
     * @return A string representation.
     */
    @Override

 * to ensure visibility of changes across threads.
 *
 * <p>The class also provides methods to manage URL patterns for inclusion and exclusion, which
 * are stored as {@code Pattern} objects.
 */
public class MemoryDataHelper {
    /** Map of session IDs to URL queues for managing crawling queues. */
    protected volatile Map<String, Queue<UrlQueueImpl<Long>>> urlQueueMap = new HashMap<>();

 * </p>
 *
 * <p>
 * The class uses a cache for XPathAPI objects to improve performance. The cache duration is configurable.
 * </p>
 *
 * <p>
 * The transform method takes a ResponseData object containing the XML content and returns a ResultData object with the extracted and formatted data.
 * </p>
 *
 * <p>

    /**
     * Logs a message using the provided LogHelper.
     * @param logHelper The LogHelper instance.
     * @param key The LogType key.
     * @param objs The objects to log.
     */
    protected void log(final LogHelper logHelper, final LogType key, final Object... objs) {
        if (logHelper != null) {
            logHelper.log(key, objs);
        }
    }

    /**

 *   <li>enterLocalPassiveMode: Whether to enter local passive mode.</li>
 *   <li>ftpAuthentications: An array of {@link FtpAuthentication} objects for different FTP URLs.</li>
 * </ul>
 *
 * <p>
 * The class also supports FTP authentication via {@link FtpAuthenticationHolder}, which stores
 * authentication details for different FTP URLs.
 * </p>
 *