}
  }

  static final class TestCloseable implements Closeable {
    private final CountDownLatch latch = new CountDownLatch(1);
    private final String name;

    TestCloseable(String name) {
      this.name = name;
    }

    @Override
    public void close() throws IOException {
      latch.countDown();
    }

    boolean awaitClosed() {

    }
  }

  static final class TestCloseable implements Closeable {
    private final CountDownLatch latch = new CountDownLatch(1);
    private final String name;

    TestCloseable(String name) {
      this.name = name;
    }

    @Override
    public void close() throws IOException {
      latch.countDown();
    }

    boolean awaitClosed() {