final Equivalence<Object> keyEquivalence;
    final Equivalence<Object> valueEquivalence;
    final int concurrencyLevel;

    transient ConcurrentMap<K, V> delegate;

    AbstractSerializationProxy(
        Strength keyStrength,
        Strength valueStrength,
        Equivalence<Object> keyEquivalence,
        Equivalence<Object> valueEquivalence,
        int concurrencyLevel,
        ConcurrentMap<K, V> delegate) {

    final Equivalence<Object> keyEquivalence;
    final Equivalence<Object> valueEquivalence;
    final int concurrencyLevel;

    transient ConcurrentMap<K, V> delegate;

    AbstractSerializationProxy(
        Strength keyStrength,
        Strength valueStrength,
        Equivalence<Object> keyEquivalence,
        Equivalence<Object> valueEquivalence,
        int concurrencyLevel,
        ConcurrentMap<K, V> delegate) {

  @CanIgnoreReturnValue
  CacheBuilder<K, V> valueEquivalence(Equivalence<Object> equivalence) {
    checkState(
        valueEquivalence == null, "value equivalence was already set to %s", valueEquivalence);
    this.valueEquivalence = checkNotNull(equivalence);
    return this;
  }

  Equivalence<Object> getValueEquivalence() {
    return MoreObjects.firstNonNull(valueEquivalence, getValueStrength().defaultEquivalence());
  }

  @CanIgnoreReturnValue
  CacheBuilder<K, V> valueEquivalence(Equivalence<Object> equivalence) {
    checkState(
        valueEquivalence == null, "value equivalence was already set to %s", valueEquivalence);
    this.valueEquivalence = checkNotNull(equivalence);
    return this;
  }

  Equivalence<Object> getValueEquivalence() {
    return MoreObjects.firstNonNull(valueEquivalence, getValueStrength().defaultEquivalence());
  }

        Ticker ticker,
        CacheLoader<? super K, V> loader) {
      this.keyStrength = keyStrength;
      this.valueStrength = valueStrength;
      this.keyEquivalence = keyEquivalence;
      this.valueEquivalence = valueEquivalence;
      this.expireAfterWriteNanos = expireAfterWriteNanos;
      this.expireAfterAccessNanos = expireAfterAccessNanos;
      this.maxWeight = maxWeight;
      this.weigher = weigher;

        Ticker ticker,
        CacheLoader<? super K, V> loader) {
      this.keyStrength = keyStrength;
      this.valueStrength = valueStrength;
      this.keyEquivalence = keyEquivalence;
      this.valueEquivalence = valueEquivalence;
      this.expireAfterWriteNanos = expireAfterWriteNanos;
      this.expireAfterAccessNanos = expireAfterAccessNanos;
      this.maxWeight = maxWeight;
      this.weigher = weigher;

          Equivalence<? super @NonNull V> valueEquivalence) {
    Preconditions.checkNotNull(valueEquivalence);

    Map<K, V> onlyOnLeft = new LinkedHashMap<>();
    Map<K, V> onlyOnRight = new LinkedHashMap<>(right); // will whittle it down
    Map<K, V> onBoth = new LinkedHashMap<>();
    Map<K, ValueDifference<V>> differences = new LinkedHashMap<>();
    doDifference(left, right, valueEquivalence, onlyOnLeft, onlyOnRight, onBoth, differences);

          protected int doHash(Object t) {
            return 0;
          }
        };

    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().valueEquivalence(testEquivalence));
    assertThat(map.valueEquivalence).isSameInstanceAs(testEquivalence);
    assertThat(map.keyEquivalence).isSameInstanceAs(map.keyStrength.defaultEquivalence());
  }

  public void testSetConcurrencyLevel() {

          protected int doHash(Object t) {
            return 0;
          }
        };

    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().valueEquivalence(testEquivalence));
    assertThat(map.valueEquivalence).isSameInstanceAs(testEquivalence);
    assertThat(map.keyEquivalence).isSameInstanceAs(map.keyStrength.defaultEquivalence());
  }

  public void testSetConcurrencyLevel() {

          Equivalence<? super @NonNull V> valueEquivalence) {
    Preconditions.checkNotNull(valueEquivalence);

    Map<K, V> onlyOnLeft = new LinkedHashMap<>();
    Map<K, V> onlyOnRight = new LinkedHashMap<>(right); // will whittle it down
    Map<K, V> onBoth = new LinkedHashMap<>();
    Map<K, ValueDifference<V>> differences = new LinkedHashMap<>();
    doDifference(left, right, valueEquivalence, onlyOnLeft, onlyOnRight, onBoth, differences);