* @see ClosingFuture#finishToValueAndCloser(ValueAndCloserConsumer, Executor)
   */
  public static final class ValueAndCloser<V extends @Nullable Object> {

    private final ClosingFuture<? extends V> closingFuture;

    ValueAndCloser(ClosingFuture<? extends V> closingFuture) {
      this.closingFuture = checkNotNull(closingFuture);
    }

    /**