assertEquals(2, keys.count(k0()));
    assertEquals(1, keys.count(k1()));
    assertEquals(3, keys.size());
    assertContainsAllOf(keys, k0(), k1());
    assertContainsAllOf(
        keys.entrySet(), Multisets.immutableEntry(k0(), 2), Multisets.immutableEntry(k1(), 1));
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testKeysCountAbsentNullKey() {
    assertEquals(0, multimap().keys().count(null));

  private void assertMapsEqual(Map<?, ?> expected, Map<?, ?> map) {
    assertEquals(expected, map);
    assertEquals(expected.hashCode(), map.hashCode());
    assertEquals(expected.entrySet(), map.entrySet());

    // Assert that expectedValues > mapValues and that
    // mapValues > expectedValues; i.e. that expectedValues == mapValues.
    Collection<?> expectedValues = expected.values();

        .addEqualityGroup(getMultiset())
        .addEqualityGroup(getSubjectGenerator().create())
        .testEquals();
  }

  public void testHashCodeMatchesEntrySet() {
    assertEquals(getMultiset().entrySet().hashCode(), getMultiset().hashCode());
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  public void testEqualsMultisetWithNullValue() {
    new EqualsTester()

    public Collection<Object> values() {
        return parent.values();
    }

    @Override
    public Set<java.util.Map.Entry<String, Object>> entrySet() {
        if (parent.containsKey(LANG_KEY)) {
            final List<java.util.Map.Entry<String, Object>> list = new ArrayList<>(parent.entrySet());
            Collections.sort(list, (o1, o2) -> {
                final String k1 = o1.getKey();
                if (LANG_KEY.equals(k1)) {

  @Override
  Iterator<E> elementIterator() {
    throw new AssertionError("should never be called");
  }

  /** @deprecated Internal method, use {@link #entrySet()}. */
  @Deprecated
  @Override
  public Set<Multiset.Entry<E>> createEntrySet() {
    return new EntrySet();
  }

  @Override
  int distinctElements() {
    return countMap.size();
  }

  @Override
  public boolean isEmpty() {

     */
    abstract Set<Entry<K, V>> createEntrySet();

    @LazyInit @CheckForNull private transient Set<Entry<K, V>> entrySet;

    @Override
    public Set<Entry<K, V>> entrySet() {
      Set<Entry<K, V>> result = entrySet;
      return (result == null) ? entrySet = createEntrySet() : result;
    }

    @LazyInit @CheckForNull private transient Set<K> keySet;

    @Override

        try {
            final RESULT result = entityType.newInstance();
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setAttributes(source.entrySet().stream().filter(e -> !"name".equals(e.getKey()))
                    .map(e -> new Pair<>(e.getKey(), (String) e.getValue())).collect(Collectors.toMap(Pair::getFirst, Pair::getSecond)));
            return result;

     */
    abstract Set<Entry<K, V>> createEntrySet();

    @LazyInit @CheckForNull private transient Set<Entry<K, V>> entrySet;

    @Override
    public Set<Entry<K, V>> entrySet() {
      Set<Entry<K, V>> result = entrySet;
      return (result == null) ? entrySet = createEntrySet() : result;
    }

    @LazyInit @CheckForNull private transient Set<K> keySet;

    @Override

          if (oldCount <= occurrences) {
            itr.remove();
          }
        }
      }
      return oldCount;
    }

    @Override
    public Set<Multiset.Entry<K>> entrySet() {
      return new Multisets.EntrySet<K>() {

        @Override
        Multiset<K> multiset() {
          return Keys.this;
        }

        @Override
        public Iterator<Multiset.Entry<K>> iterator() {

    }

    @Override
    public void clear() {
      throw new UnsupportedOperationException();
    }

    @Override
    public int count(@Nullable Object element) {
      for (Entry<E> entry : entrySet()) {
        if (Objects.equal(entry.getElement(), element)) {
          return entry.getCount();
        }
      }
      return 0;
    }

    @Override