return new Callable<String>() {
      @Override
      public String call() {
        return object.toString();
      }
    };
  }

  public void testCancellationDuringReentrancy() throws Exception {
    TestLogHandler logHandler = new TestLogHandler();
    Logger.getLogger(AbstractFuture.class.getName()).addHandler(logHandler);

    List<Future<?>> results = new ArrayList<>();