if (strength != Strength.STRONG) {
      // STRONG could be used during deserialization.
      useCustomMap = true;
    }
    return this;
  }

  Strength getValueStrength() {
    return MoreObjects.firstNonNull(valueStrength, Strength.STRONG);
  }

  /**
   * Builds a thread-safe map. This method does not alter the state of this {@code MapMaker}

  public void testDrainValueReferenceQueueOnWrite() {
    for (MapMaker maker : allWeakValueStrengthMakers()) {
      MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(maker.concurrencyLevel(1));
      if (maker.getValueStrength() == Strength.WEAK) {
        Segment<Object, Object, ?, ?> segment = map.segments[0];

        Object keyOne = new Object();
        int hashOne = map.hash(keyOne);
        Object valueOne = new Object();

  public void testDrainValueReferenceQueueOnWrite() {
    for (MapMaker maker : allWeakValueStrengthMakers()) {
      MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(maker.concurrencyLevel(1));
      if (maker.getValueStrength() == Strength.WEAK) {
        Segment<Object, Object, ?, ?> segment = map.segments[0];

        Object keyOne = new Object();
        int hashOne = map.hash(keyOne);
        Object valueOne = new Object();