iterator.next();
        });
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_notPresent() {
    assertNull("remove(notPresent) should return null", getMap().remove(k3()));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})
  @CollectionSize.Require(absent = ZERO)
  public void testRemove_nullPresent() {
    initMapWithNullKey();

  @MapFeature.Require(SUPPORTS_PUT)
  public void testAbsent() {
    assertEquals(
        "Map.merge(absent, value, function) should return value",
        v3(),
        getMap()
            .merge(
                k3(),
                v3(),
                (oldV, newV) -> {
                  throw new AssertionFailedError(
                      "Should not call merge function if key was absent");
                }));

      return entry.value;
    }
    entry = cacheEntry2;
    if (entry != null && entry.key == key) {
      // Promote second cache entry to first so the access pattern
      // [K1, K2, K1, K3, K1, K4...] still hits the cache half the time.
      addToCache(entry);
      return entry.value;
    }
    return null;
  }

  @Override
  void clearCache() {
    super.clearCache();

  @CollectionSize.Require(absent = ZERO)
  public void testContainsKeyYes() {
    assertTrue(multimap().containsKey(k0()));
  }

  public void testContainsKeyNo() {
    assertFalse(multimap().containsKey(k3()));
  }

  public void testContainsKeysFromKeySet() {
    for (K k : multimap().keySet()) {
      assertTrue(multimap().containsKey(k));
    }
  }

  public void testContainsKeyAgreesWithGet() {

   */
  public static <K, V> ImmutableSetMultimap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
    ImmutableSetMultimap.Builder<K, V> builder = ImmutableSetMultimap.builder();
    builder.put(k1, v1);
    builder.put(k2, v2);
    builder.put(k3, v3);
    return builder.build();
  }

  /**

  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutIfAbsent_nullValueUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().putIfAbsent(k3(), null));
    expectUnchanged();
    expectNullValueMissingWhenNullValuesUnsupported(
        "Should not contain null value after unsupported put(key, null)");
  }

public class MultimapRemoveAllTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemoveAllAbsentKey() {
    assertEmpty(multimap().removeAll(k3()));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemoveAllPresentKey() {
    assertContentsAnyOrder(multimap().removeAll(k0()), v0());

@IgnoreJRERequirement // We opt into library desugaring for our tests.
public class MapReplaceAllTester<K, V> extends AbstractMapTester<K, V> {
  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()

  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutIfAbsent_nullValueUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().putIfAbsent(k3(), null));
    expectUnchanged();
    expectNullValueMissingWhenNullValuesUnsupported(
        "Should not contain null value after unsupported put(key, null)");
  }

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MultimapGetTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  public void testGetEmpty() {
    Collection<V> result = multimap().get(k3());
    assertEmpty(result);
    assertEquals(0, result.size());
  }

  @CollectionSize.Require(absent = ZERO)
  public void testGetNonEmpty() {
    Collection<V> result = multimap().get(k0());