int key0Count = multimap().get(k0()).size();
    assertEquals(key0Count > 0, multimap().keySet().remove(k0()));
    assertEquals(getNumElements() - key0Count, multimap().size());
    assertGet(k0());
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  public void testKeySetIteratorRemove() {
    int key0Count = multimap().get(k0()).size();

      result = murmurHash64WithSeed(bytes, offset, length, K0 ^ K1 ^ K2);
    } else if (length <= 64) {
      result = hashLength33To64(bytes, offset, length);
    } else {
      result = fullFingerprint(bytes, offset, length);
    }

    long u = length >= 8 ? load64(bytes, offset) : K0;
    long v = length >= 9 ? load64(bytes, offset + length - 8) : K0;
    result = hash128to64(result + v, u);

        v3(),
        getMap()
            .computeIfPresent(
                k0(),
                (k, v) -> {
                  assertEquals(k0(), k);
                  assertEquals(v0(), v);
                  return v3();
                }));
    expectReplacement(entry(k0(), v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)

    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());

  public void testReplaceEntry_supportedPresent() {
    assertTrue(getMap().replace(k0(), v0(), v3()));
    expectReplacement(entry(k0(), v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_supportedPresentUnchanged() {
    assertTrue(getMap().replace(k0(), v0(), v0()));
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_PUT)

    try {
      assertTrue(getMap().replace(k0(), v0(), v3()));
      expectReplacement(entry(k0(), v3()));
    } catch (ClassCastException tolerated) { // for ClassToInstanceMap
      expectUnchanged();
    }
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_supportedPresentUnchanged() {
    assertTrue(getMap().replace(k0(), v0(), v0()));
    expectUnchanged();
  }

    ListMultimap<K, V> multimap1 =
        getSubjectGenerator()
            .create(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v0()));
    ListMultimap<K, V> multimap2 =
        getSubjectGenerator()
            .create(mapEntry(k0(), v1()), mapEntry(k0(), v0()), mapEntry(k0(), v0()));
    new EqualsTester().addEqualityGroup(multimap1).addEqualityGroup(multimap2).testEquals();
  }

      result = murmurHash64WithSeed(bytes, offset, length, K0 ^ K1 ^ K2);
    } else if (length <= 64) {
      result = hashLength33To64(bytes, offset, length);
    } else {
      result = fullFingerprint(bytes, offset, length);
    }

    long u = length >= 8 ? load64(bytes, offset) : K0;
    long v = length >= 9 ? load64(bytes, offset + length - 8) : K0;
    result = hash128to64(result + v, u);

  @CollectionSize.Require(absent = ZERO)
  public void testRemove_unsupported() {
    assertThrows(UnsupportedOperationException.class, () -> getMap().remove(k0()));
    expectUnchanged();
    assertEquals("remove(present) should not remove the element", v0(), get(k0()));
  }

  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_unsupportedNotPresent() {
    try {
      assertNull(

  public void testSetValue() {
    for (Entry<K, V> entry : getMap().entrySet()) {
      if (entry.getKey().equals(k0())) {
        assertEquals("entry.setValue() should return the old value", v0(), entry.setValue(v3()));
        break;
      }
    }
    expectReplacement(entry(k0(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)