}
  }

  private static class ImmediateScheduledFuture<V> extends SimpleForwardingListenableFuture<V>
      implements ListenableScheduledFuture<V> {
    static <V> ListenableScheduledFuture<V> of(V value) {
      return new ImmediateScheduledFuture<>(immediateFuture(value));
    }

    static <V> ListenableScheduledFuture<V> failed(Throwable t) {
      return new ImmediateScheduledFuture<>(immediateFailedFuture(t));
    }

    ListenableFuture<V> delegateFuture = submit(callable);
    return new ImmediateScheduledFuture<>(delegateFuture);
  }

  private static final class ImmediateScheduledFuture<V> extends SimpleForwardingListenableFuture<V>
      implements ListenableScheduledFuture<V> {
    ImmediateScheduledFuture(ListenableFuture<V> future) {
      super(future);
    }

    @Override

    ListenableFuture<V> delegateFuture = submit(callable);
    return new ImmediateScheduledFuture<>(delegateFuture);
  }

  private static final class ImmediateScheduledFuture<V> extends SimpleForwardingListenableFuture<V>
      implements ListenableScheduledFuture<V> {
    ImmediateScheduledFuture(ListenableFuture<V> future) {
      super(future);
    }

    @Override