keyEquivalence = checkNotNull(equivalence);
    return this;
  }

  Equivalence<Object> getKeyEquivalence() {
    return MoreObjects.firstNonNull(keyEquivalence, getKeyStrength().defaultEquivalence());
  }

  /**
   * Sets a custom {@code Equivalence} strategy for comparing values.
   *
   * <p>By default, the cache uses {@link Equivalence#identity} to determine value equality when

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

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

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

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

    keyEquivalence = checkNotNull(equivalence);
    return this;
  }

  Equivalence<Object> getKeyEquivalence() {
    return MoreObjects.firstNonNull(keyEquivalence, getKeyStrength().defaultEquivalence());
  }

  /**
   * Sets a custom {@code Equivalence} strategy for comparing values.
   *
   * <p>By default, the cache uses {@link Equivalence#identity} to determine value equality when