this(12, DEFAULT_VALUES_PER_KEY);
  }

  private HashMultimap(int expectedKeys, int expectedValuesPerKey) {
    super(Platform.<K, Collection<V>>newHashMapWithExpectedSize(expectedKeys));
    Preconditions.checkArgument(expectedValuesPerKey >= 0);
    this.expectedValuesPerKey = expectedValuesPerKey;
  }

  private HashMultimap(Multimap<? extends K, ? extends V> multimap) {

    ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create();
    assertEquals(3, multimap.expectedValuesPerKey);
  }

  public void testCreateFromSizes() {
    ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(15, 20);
    assertEquals(20, multimap.expectedValuesPerKey);
  }

  public void testCreateFromIllegalSizes() {

    assertThrows(
        IllegalArgumentException.class, () -> ImmutableMultimap.builder().expectedValuesPerKey(-1));
  }

  public void testBuilderWithExpectedValuesPerKeyZero() {
    ImmutableMultimap.Builder<String, String> builder =
        ImmutableMultimap.<String, String>builder().expectedValuesPerKey(0);
    builder.put("key", "value");

    ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create();
    assertEquals(3, multimap.expectedValuesPerKey);
  }

  public void testCreateFromSizes() {
    ArrayListMultimap<String, Integer> multimap = ArrayListMultimap.create(15, 20);
    assertEquals(20, multimap.expectedValuesPerKey);
  }

  public void testCreateFromIllegalSizes() {

    assertThrows(
        IllegalArgumentException.class, () -> ImmutableMultimap.builder().expectedValuesPerKey(-1));
  }

  public void testBuilderWithExpectedValuesPerKeyZero() {
    ImmutableMultimap.Builder<String, String> builder =
        ImmutableMultimap.<String, String>builder().expectedValuesPerKey(0);
    builder.put("key", "value");

    assertEquals(2, copy.expectedValuesPerKey);
  }

  public void testCreateFromSizes() {
    HashMultimap<String, Integer> multimap = HashMultimap.create(20, 15);
    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
    assertEquals(15, multimap.expectedValuesPerKey);
  }

    assertEquals(2, copy.expectedValuesPerKey);
  }

  public void testCreateFromSizes() {
    HashMultimap<String, Integer> multimap = HashMultimap.create(20, 15);
    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
    assertEquals(15, multimap.expectedValuesPerKey);
  }