this(12, DEFAULT_VALUES_PER_KEY);
  }

  private ArrayListMultimap(int expectedKeys, int expectedValuesPerKey) {
    super(Platform.<K, Collection<V>>newHashMapWithExpectedSize(expectedKeys));
    checkNonnegative(expectedValuesPerKey, "expectedValuesPerKey");
    this.expectedValuesPerKey = expectedValuesPerKey;
  }

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

      checkNonnegative(expectedValuesPerKey, "expectedValuesPerKey");

      // Always presize to at least 1, since we only bother creating a value collection if there's
      // at least one element.
      this.expectedValuesPerKey = max(expectedValuesPerKey, 1);

      return this;
    }

    /**

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

  public void testBuilderWithExpectedValuesPerKeyZero() {
    ImmutableSetMultimap.Builder<String, String> builder =
        ImmutableSetMultimap.<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() {

    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);
  }

   * @param expectedValuesPerKey the expected average number of values per key
   * @throws IllegalArgumentException if {@code expectedKeys} or {@code expectedValuesPerKey} is
   *     negative
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      LinkedHashMultimap<K, V> create(int expectedKeys, int expectedValuesPerKey) {
    return new LinkedHashMultimap<>(

    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");

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

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

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

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