}

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testContains_nullContained() {
    initMapWithNullKey();
    assertTrue("containsKey(null) should return true", getMap().containsKey(null));
  }

  @MapFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testContains_keyWithNullValueContained() {

  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testGet_nullNotContainedAndUnsupported() {
    try {
      assertNull("get(null) should return null or throw", get(null));
    } catch (NullPointerException tolerated) {
    }
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testGet_nonNullWhenNullContained() {

      }
    }
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES})
  public void testContainsEntryNullYes() {
    initMultimapWithNullKeyAndValue();
    assertTrue(multimap().containsEntry(null, null));
  }

  @MapFeature.Require({ALLOWS_NULL_KEY_QUERIES, ALLOWS_NULL_VALUE_QUERIES})
  public void testContainsEntryNullNo() {

                (k, v) -> {
                  throw new AssertionFailedError();
                }));
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testComputeIfPresent_supportedPresent() {
    assertEquals(
        "computeIfPresent(present, function) should return new value",
        v3(),
        getMap()
            .computeIfPresent(
                k0(),

@Inherited
public @interface Mojo {
    /**
     * goal name (required).
     * @return the goal name
     */
    @Nonnull
    String name();

    /**
     * default phase to bind your mojo.
     * @return the default phase
     */
    @Nonnull
    String defaultPhase() default "";

    /**
     * does your mojo requires a project to be executed?
     * @return requires a project
     */

    assertEquals(2, multimap().size());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testPropagatesRemoveLastElementToMultimap() {
    Collection<V> result = multimap().asMap().get(k0());
    assertTrue(result.remove(v0()));
    assertGet(k0());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testPropagatesClearToMultimap() {

  @CollectionFeature.Require(SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_supportedAllPresent() {
    assertTrue(
        "addAll(allPresent) should return true", getList().addAll(MinimalCollection.of(e0())));
    expectAdded(e0());
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)

    return (ConcurrentMap<K, V>) super.getMap();
  }

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

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

    }
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_nonNullWhenNullContained() {
    initMapWithNullKey();
    assertEquals(
        "getOrDefault(absent, default) should return default",
        v3(),
        getMap().getOrDefault(k3(), v3()));
  }

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

  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testValuesInOrder() {
    List<V> expected = new ArrayList<>();
    for (Entry<K, V> entry : getOrderedElements()) {
      expected.add(entry.getValue());
    }
    assertEqualInOrder(expected, multimap().values());
  }

  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  @CollectionSize.Require(ONE)
  public void testValuesIteratorRemove() {