V v4,
      K k5,
      V v5,
      K k6,
      V v6,
      K k7,
      V v7,
      K k8,
      V v8,
      K k9,
      V v9) {
    return new RegularImmutableBiMap<K, V>(
        ImmutableMap.of(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5, k6, v6, k7, v7, k8, v8, k9, v9));
  }

  public static <K, V> ImmutableBiMap<K, V> of(
      K k1,
      V v1,
      K k2,
      V v2,
      K k3,