static boolean notInstanceOfDelegatingToFuture(@Nullable Object obj) {
    return !(obj instanceof DelegatingToFuture);
  }

  @Override
  public boolean isDone() {
    @RetainedLocalRef Object localValue = value();
    return localValue != null & notInstanceOfDelegatingToFuture(localValue);
  }

  @Override
  public boolean isCancelled() {