/** Performs a GAS operation on {@link AbstractFutureState#waitersField}. */
    abstract @Nullable Waiter gasWaiters(AbstractFutureState<?> future, Waiter update);

    /** Performs a GAS operation on {@link AbstractFutureState#listenersField}. */
    abstract @Nullable Listener gasListeners(AbstractFutureState<?> future, Listener update);

    }

    /**
     * Behavior handler for CrawlingInfoParam entities.
     * Used to perform database operations on crawling session parameters.
     */
    @Resource
    protected CrawlingInfoParamBhv crawlingInfoParamBhv;

    /**
     * Behavior handler for CrawlingInfo entities.
     * Used to perform database operations on crawling session information.
     */
    @Resource

        // Perform the upgrade logic
        int result = doUpgrade(context, targetModel, pomMap);

        // Save modifications if this is an apply goal
        if (shouldSaveModifications() && result == 0) {
            saveModifications(context, pomMap);
        }

        return result;
    }

    /**
     * Performs the upgrade logic using the strategy pattern.

   * of refreshes are specified in {@link LoadingCache#refresh}, and are performed by calling {@link
   * CacheLoader#reload}.
   *
   * <p>As the default implementation of {@link CacheLoader#reload} is synchronous, it is
   * recommended that users of this method override {@link CacheLoader#reload} with an asynchronous
   * implementation; otherwise refreshes will be performed during unrelated cache read and write
   * operations.
   *

/**
 * An object that converts literal text into a format safe for inclusion in a particular context
 * (such as an XML document). Typically (but not always), the inverse process of "unescaping" the
 * text is performed automatically by the relevant parser.
 *
 * <p>For example, an XML escaper would convert the literal string {@code "Foo<Bar>"} into {@code
 * "Foo&lt;Bar&gt;"} to prevent {@code "<Bar>"} from being confused with an XML tag. When the

     * <code>possibleNTDomainOrWorkgroup</code> parameter is <code>true</code> an
     * addtional name query will be performed to locate a master browser.
     *
     * @param hostname the hostname to resolve
     * @param possibleNTDomainOrWorkgroup whether to perform additional name query for master browser
     * @return the resolved UniAddress
     * @throws UnknownHostException if the host cannot be resolved

   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>Note that if {@code list} is a {@code List<String>}, then {@code ImmutableList.copyOf(list)}

     */
    public OptionalEntity<JobLog> getJobLog(final String id) {
        return jobLogBhv.selectByPK(id);
    }

    /**
     * Stores a job log entry in the database.
     * Performs an insert or update operation based on whether the job log already exists.
     *
     * @param jobLog the job log to store
     */
    public void store(final JobLog jobLog) {

 *
 * <p><b>Warning:</b> Be extremely careful what you do with conceptually large instances (such as
 * {@code ContiguousSet.create(Range.greaterThan(0), DiscreteDomain.integers()}). Certain operations
 * on such a set can be performed efficiently, but others (such as {@link Set#hashCode} or {@link
 * Collections#frequency}) can cause major performance problems.
 *
 * @author Gregory Kick
 * @since 10.0
 */
@GwtCompatible

 *
 * <p><b>Warning:</b> Be extremely careful what you do with conceptually large instances (such as
 * {@code ContiguousSet.create(Range.greaterThan(0), DiscreteDomain.integers()}). Certain operations
 * on such a set can be performed efficiently, but others (such as {@link Set#hashCode} or {@link
 * Collections#frequency}) can cause major performance problems.
 *
 * @author Gregory Kick
 * @since 10.0
 */
@GwtCompatible