throw new AssertionError("Unexpected exception", e);
    } finally {
      executor.shutdownNow();
      // TODO(cpovirk): assertTrue(awaitTerminationUninterruptibly(executor, 10, SECONDS));
    }
  }

  /**
   * For each possible pair of futures from {@link TestFutureBatch}, for each possible completion

      throw new AssertionError("Unexpected exception", e);
    } finally {
      executor.shutdownNow();
      // TODO(cpovirk): assertTrue(awaitTerminationUninterruptibly(executor, 10, SECONDS));
    }
  }

  /**
   * For each possible pair of futures from {@link TestFutureBatch}, for each possible completion