* Returns the access count.
     * @return The access count.
     */
    public long getAccessCount() {
        return accessCount.get();
    }

    /**
     * Increments the access count and returns the new value.
     * @return The incremented access count.
     */
    public long incrementAndGetAccessCount() {
        return accessCount.incrementAndGet();
    }

    /**

     * crawlers to retrieve only a subset of the Sitemaps in the index i.e. a
     * crawler may only retrieve Sitemaps that were modified since a certain
     * date. This incremental Sitemap fetching mechanism allows for the rapid
     * discovery of new URLs on very large sites.
     */
    private String lastmod;

    /**
     * Creates a new SitemapFile instance.
     */

 *   for successful and unsuccessful computations, respectively.
 * </p>
 *
 * <p>
 *   The Deferred class uses a CountDownLatch to allow you to wait for the computation to complete.
 *   The resolve and reject methods decrement the CountDownLatch, allowing the getResponse method
 *   to return the result of the computation.
 * </p>
 *
 * @param <RESPONSE> The type of the response.
 */
public class Deferred<RESPONSE extends Response> {