assertThrows(
        IllegalArgumentException.class, () -> ImmutableListMultimap.builderWithExpectedKeys(-1));
  }

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

    assertThrows(
        IllegalArgumentException.class, () -> ImmutableSetMultimap.builderWithExpectedKeys(-1));
  }

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

    assertThrows(
        IllegalArgumentException.class, () -> ImmutableListMultimap.builderWithExpectedKeys(-1));
  }

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

   * {@code expectedKeys} is a good estimate.
   *
   * @throws IllegalArgumentException if {@code expectedKeys} is negative
   * @since 33.3.0
   */
  public static <K, V> Builder<K, V> builderWithExpectedKeys(int expectedKeys) {
    checkNonnegative(expectedKeys, "expectedKeys");
    return new Builder<>(expectedKeys);
  }

  /**