import static com.google.common.util.concurrent.Futures.immediateVoidFuture;
import static com.google.common.util.concurrent.Futures.inCompletionOrder;
import static com.google.common.util.concurrent.Futures.lazyTransform;
import static com.google.common.util.concurrent.Futures.nonCancellationPropagating;
import static com.google.common.util.concurrent.Futures.scheduleAsync;
import static com.google.common.util.concurrent.Futures.submit;

        if (previousValue == null) {
          V newValue = loader.load(key);
          return set(newValue) ? futureValue : Futures.immediateFuture(newValue);
        }
        ListenableFuture<V> newValue = loader.reload(key, previousValue);
        if (newValue == null) {
          return Futures.immediateFuture(null);
        }
        // To avoid a race, make sure the refreshed value is set into loadingValueReference

    public static final String ERRORS_failed_to_create_crawling_config_at_wizard = "{errors.failed_to_create_crawling_config_at_wizard}";

    /** The key of the message: This feature is disabled. */
    public static final String ERRORS_design_editor_disabled = "{errors.design_editor_disabled}";

    /** The key of the message: Not Found: {0} */