checkArgument(value == null, "key %s does not take values", key);
      checkArgument(
          spec.valueStrength == null, "%s was already set to %s", key, spec.valueStrength);

      spec.valueStrength = strength;
    }
  }

  /** Parse recordStats */
  static class RecordStatsParser implements ValueParser {

    @Override

    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);
    assertEquals("statsCounterSupplier", a.statsCounterSupplier, b.statsCounterSupplier);
    assertEquals("ticker", a.ticker, b.ticker);

   * MapMakerInternalMap#createWithDummyValues}.
   */
  enum Dummy {
    VALUE
  }

  MapMaker setValueStrength(Strength strength) {
    checkState(valueStrength == null, "Value strength was already set to %s", valueStrength);
    valueStrength = checkNotNull(strength);
    if (strength != Strength.STRONG) {
      // STRONG could be used during deserialization.
      useCustomMap = true;
    }
    return this;

    Preconditions.checkArgument(!this.keyStrengths.contains(Strength.SOFT));
    return this;
  }

  CacheBuilderFactory withValueStrengths(Set<Strength> valueStrengths) {
    this.valueStrengths = Sets.newLinkedHashSet(valueStrengths);
    return this;
  }

  Iterable<CacheBuilder<Object, Object>> buildAllPermutations() {
    Iterable<List<Object>> combinations =
        buildCartesianProduct(

      checkArgument(value == null, "key %s does not take values", key);
      checkArgument(
          spec.valueStrength == null, "%s was already set to %s", key, spec.valueStrength);

      spec.valueStrength = strength;
    }
  }

  /** Parse recordStats */
  static class RecordStatsParser implements ValueParser {

    @Override

    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);
    assertEquals("statsCounterSupplier", a.statsCounterSupplier, b.statsCounterSupplier);
    assertEquals("ticker", a.ticker, b.ticker);

    Preconditions.checkArgument(!this.keyStrengths.contains(Strength.SOFT));
    return this;
  }

  CacheBuilderFactory withValueStrengths(Set<Strength> valueStrengths) {
    this.valueStrengths = Sets.newLinkedHashSet(valueStrengths);
    return this;
  }

  Iterable<CacheBuilder<Object, Object>> buildAllPermutations() {
    Iterable<List<Object>> combinations =
        buildCartesianProduct(

  Strength keyStrength() {
    return entryHelper.keyStrength();
  }

  @VisibleForTesting
  Strength valueStrength() {
    return entryHelper.valueStrength();
  }

  @VisibleForTesting
  Equivalence<Object> valueEquivalence() {
    return entryHelper.valueStrength().defaultEquivalence();
  }

  // ConcurrentMap methods

  @Override
  public boolean isEmpty() {
    /*

  private static void checkStrength(
      MapMakerInternalMap<Object, Object, ?, ?> map, Strength keyStrength, Strength valueStrength) {
    assertSame(keyStrength, map.keyStrength());
    assertSame(valueStrength, map.valueStrength());
    assertSame(keyStrength.defaultEquivalence(), map.keyEquivalence);
    assertSame(valueStrength.defaultEquivalence(), map.valueEquivalence());
  }

  // Segment core tests

  private static void checkStrength(
      MapMakerInternalMap<Object, Object, ?, ?> map, Strength keyStrength, Strength valueStrength) {
    assertSame(keyStrength, map.keyStrength());
    assertSame(valueStrength, map.valueStrength());
    assertSame(keyStrength.defaultEquivalence(), map.keyEquivalence);
    assertSame(valueStrength.defaultEquivalence(), map.valueEquivalence());
  }

  // Segment core tests