}
    valueAndCloser.closeAsync();
  }

  @Override
  void assertBecomesCanceled(ClosingFuture<?> closingFuture) throws ExecutionException {
    assertThatFutureBecomesCancelled(closingFuture.statusFuture());
  }

  @Override
  void waitUntilClosed(ClosingFuture<?> closingFuture) {
    if (valueAndCloser != null) {
      valueAndCloser.closeAsync();
    }

    }
    valueAndCloser.closeAsync();
  }

  @Override
  void assertBecomesCanceled(ClosingFuture<?> closingFuture) throws ExecutionException {
    assertThatFutureBecomesCancelled(closingFuture.statusFuture());
  }

  @Override
  void waitUntilClosed(ClosingFuture<?> closingFuture) {
    if (valueAndCloser != null) {
      valueAndCloser.closeAsync();
    }

 *   // do something with userName
 * } finally {
 *   userNameValueAndCloser.closeAsync();
 * }
 * }</pre>
 *
 * In this example, when {@code userNameValueAndCloser.closeAsync()} is called, the transaction and
 * the query result cursor will both be closed, even if the operation is cancelled or fails.
 *
 * <p>Note that if you don't call {@code closeAsync()}, the captured objects will not be closed. The