* @param sessionId The session ID.
     */
    void delete(String sessionId);

    /**
     * Deletes all URL queues.
     */
    void deleteAll();

    /**
     * Offers all URL queues.
     *
     * @param sessionId The session ID.
     * @param newUrlQueueList The list of new URL queues.
     */
    void offerAll(String sessionId, List<QUEUE> newUrlQueueList);

    /**
     * Polls a URL queue.
     *

 *
 * <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>

 *
 * <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<>();

    /** Map of session IDs to access result maps for storing crawling results. */