public static <K, V> ImmutableBiMap<K, V> of(K k1, V v1, K k2, V v2) {
    return new RegularImmutableBiMap<K, V>(ImmutableMap.of(k1, v1, k2, v2));
  }

  public static <K, V> ImmutableBiMap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
    return new RegularImmutableBiMap<K, V>(ImmutableMap.of(k1, v1, k2, v2, k3, v3));
  }

  public static <K, V> ImmutableBiMap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {

    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());
    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
    assertTrue(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));
    assertTrue(multimap().containsEntry(k0(), v2()));
    assertEquals(oldSize + 1, multimap().size());
  }

  public void testReplaceValuesWithNullKey() {
    List<V> values = Arrays.asList(v0(), v2(), v3());
    multimap().replaceValues(null, values);
    assertGet(null, values);
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testReplaceEmptyValues() {
    int size = multimap().size();
    List<V> values = Arrays.asList(v0(), v2(), v3());
    multimap().replaceValues(k3(), values);
    assertGet(k3(), values);

  public void testRemoveAllMultipleValues() {
    resetContainer(
        Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v1()), Helpers.mapEntry(k0(), v2()));

    assertContentsAnyOrder(multimap().removeAll(k0()), v0(), v1(), v2());
    assertEmpty(multimap());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})

        v1 ^= v0;
        v3 ^= v2;
        v0 = Long.rotateLeft(v0, 32);
        v2 += v1;
        v0 += v3;
        v1 = Long.rotateLeft(v1, 17);
        v3 = Long.rotateLeft(v3, 21);
        v1 ^= v2;
        v3 ^= v0;
        v2 = Long.rotateLeft(v2, 32);
      }
    }
  }

  private static final long serialVersionUID = 0L;

    return TableCollectors.<T, R, C, V, I>toTable(
        rowFunction,
        columnFunction,
        valueFunction,
        (v1, v2) -> {
          throw new IllegalStateException("Conflicting values " + v1 + " and " + v2);
        },
        tableSupplier);
  }

  static <
          T extends @Nullable Object,
          R extends @Nullable Object,

    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());
    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
    assertTrue(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));
    assertTrue(multimap().containsEntry(k0(), v2()));
    assertEquals(oldSize + 1, multimap().size());
  }

    assertFalse(multimap().isEmpty());
  }

  @CollectionSize.Require(SEVERAL)
  public void testSizeMultipleValues() {
    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v2()));

    assertEquals(3, multimap().size());
    assertEquals(3, multimap().entries().size());
    assertEquals(3, multimap().keys().size());

    assertEquals(1, multimap().keySet().size());

            .addValue(Arrays.asList("C"))
            .addValue(Arrays.asList())
            .add(SHORT_NAME, Collections.singletonMap("k1", "v1"))
            .add(LONG_NAME, Collections.singletonMap("k2", "v2"))
            .addValue(Collections.singletonMap("k3", "v3"))
            .addValue(Collections.emptyMap())
            .addValue(null)
            .add(SHORT_NAME, java.util.Optional.of("1"))

  private SampleElements<K> keys() {
    return new SampleElements<>(k0(), k1(), k2(), k3(), k4());
  }

  private SampleElements<V> values() {
    return new SampleElements<>(v0(), v1(), v2(), v3(), v4());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testReplaceAllRotate() {
    getMap()
        .replaceAll(
            (K k, V v) -> {
              int index = keys().asList().indexOf(k);