}

  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) {
    return new RegularImmutableBiMap<K, V>(ImmutableMap.of(k1, v1, k2, v2, k3, v3, k4, v4));
  }

  public static <K, V> ImmutableBiMap<K, V> of(

   */
  public static <K, V> ImmutableBiMap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
    checkEntryNotNull(k1, v1);
    checkEntryNotNull(k2, v2);
    checkEntryNotNull(k3, v3);
    return new RegularImmutableBiMap<K, V>(new Object[] {k1, v1, k2, v2, k3, v3}, 3);
  }

  /**
   * Returns an immutable map containing the given entries, in order.
   *

    try {
      assertFalse(getMap().replace(k3(), v3(), null));
    } catch (NullPointerException tolerated) {
      // the operation would be a no-op, so exceptions are allowed but not required
    }
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUE_QUERIES})
  public void testReplaceEntry_nullDifferentFromAbsent() {
    assertFalse(getMap().replace(k3(), null, v3()));
    expectUnchanged();
  }

    assertTrue(
        multimap()
            .putAll(
                k3(),
                new Iterable<V>() {
                  @Override
                  public Iterator<V> iterator() {
                    return Lists.newArrayList(v3(), v4()).iterator();
                  }
                }));
    assertGet(k3(), v3(), v4());
  }

  @MapFeature.Require(SUPPORTS_PUT)

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutIfAbsent_supportedAbsent() {
    assertNull(
        "putIfAbsent(notPresent, value) should return null", getMap().putIfAbsent(k3(), v3()));
    expectAdded(e3());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutIfAbsent_supportedPresent() {
    assertEquals(

  }

  @CollectionSize.Require(absent = CollectionSize.ZERO)
  public void testEquals_otherMapWithDifferentEntries() {
    Map<K, V> other = newHashMap(getSampleEntries(getNumEntries() - 1));
    other.put(k3(), v3());
    assertFalse(
        "A Map should not equal another Map containing different entries.", getMap().equals(other));
  }

  @CollectionSize.Require(absent = CollectionSize.ZERO)

    assertEquals(
        "getOrDefault(absent, def) should return the default value",
        v3(),
        getMap().getOrDefault(k3(), v3()));
  }

  public void testGetOrDefault_absentNullDefault() {
    assertNull("getOrDefault(absent, null) should return null", getMap().getOrDefault(k3(), null));
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testGetOrDefault_absentNull() {
    assertEquals(

    assertTrue("containsKey(present) should return true", getMap().containsKey(k0()));
  }

  public void testContains_no() {
    assertFalse("containsKey(notPresent) should return false", getMap().containsKey(k3()));
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testContains_nullNotContainedButAllowed() {
    assertFalse("containsKey(null) should return false", getMap().containsKey(null));
  }

  @CollectionSize.Require(absent = ZERO)
  public void testContainsEntryYes() {
    assertTrue(multimap().containsEntry(k0(), v0()));
  }

  public void testContainsEntryNo() {
    assertFalse(multimap().containsEntry(k3(), v3()));
  }

  public void testContainsEntryAgreesWithGet() {
    for (K k : sampleKeys()) {
      for (V v : sampleValues()) {
        assertEquals(multimap().get(k).contains(v), multimap().containsEntry(k, v));

  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_supportedWrongKeyPresentValue() {
    assertFalse(getMap().remove(k3(), v0()));
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_supportedAbsentKeyAbsentValue() {
    assertFalse(getMap().remove(k3(), v3()));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_KEY_QUERIES)