}

  private WeakReference<Object> createWeakReference() {
    return new WeakReference<>(new Object());
  }

  public void testAwaitDone_finalizationPredicate() {
    WeakHashMap<Object, Object> map = new WeakHashMap<>();
    map.put(new Object(), Boolean.TRUE);
    GcFinalization.awaitDone(map::isEmpty);
    assertTrue(map.isEmpty());
  }

  }

  private WeakReference<Object> createWeakReference() {
    return new WeakReference<>(new Object());
  }

  public void testAwaitDone_finalizationPredicate() {
    WeakHashMap<Object, Object> map = new WeakHashMap<>();
    map.put(new Object(), Boolean.TRUE);
    GcFinalization.awaitDone(map::isEmpty);
    assertTrue(map.isEmpty());
  }