@Override
    public Spliterator<Entry<K, V>> spliterator() {
      Map<K, V> delegate = delegateOrNull();
      return (delegate != null)
          ? delegate.entrySet().spliterator()
          : CollectSpliterators.indexed(
              size, Spliterator.DISTINCT | Spliterator.ORDERED, MapEntry::new);
    }

    @Override
    public boolean contains(@Nullable Object o) {
      Map<K, V> delegate = delegateOrNull();

    }
  }

  static <E extends @Nullable Object> Spliterator<E> spliteratorImpl(Multiset<E> multiset) {
    Spliterator<Entry<E>> entrySpliterator = multiset.entrySet().spliterator();
    return CollectSpliterators.flatMap(
        entrySpliterator,
        (Entry<E> entry) -> Collections.nCopies(entry.getCount(), entry.getElement()).spliterator(),
        Spliterator.SIZED
            | (entrySpliterator.characteristics()

    @Override
    public UnmodifiableIterator<E> iterator() {
      return asList().iterator();
    }

    @Override
    public Spliterator<E> spliterator() {
      return CollectSpliterators.indexed(size(), SPLITERATOR_CHARACTERISTICS, this::get);
    }

    @Override
    public void forEach(Consumer<? super E> consumer) {
      checkNotNull(consumer);
      int n = size();

    return spliteratorWithCharacteristics(SPLITERATOR_CHARACTERISTICS);
  }

  @GwtIncompatible // Spliterator
  Spliterator<E> spliteratorWithCharacteristics(int characteristics) {
    return CollectSpliterators.indexed(size(), characteristics, this::get);
  }

  @Override
  int copyIntoArray(@Nullable Object[] dst, int offset) {
    // this loop is faster for RandomAccess instances, which ImmutableLists are

      public K next() {
        return entryIterator.next().getKey();
      }
    };
  }

  @GwtIncompatible // Spliterator
  Spliterator<K> keySpliterator() {
    return CollectSpliterators.map(
        entrySet().spliterator(),
        Spliterator.ORDERED | Spliterator.DISTINCT | Spliterator.NONNULL | Spliterator.IMMUTABLE,
        Entry::getKey);
  }

      return asMapEntryIterator(set, function);
    }

    @Override
    @GwtIncompatible // Spliterator
    Spliterator<Entry<K, V>> entrySpliterator() {
      return CollectSpliterators.map(
          set.spliterator(),
          Spliterator.DISTINCT | Spliterator.NONNULL,
          e -> immutableEntry(e, function.apply(e)));
    }

    @Override

                keySet.asList().get(index), valueList.get(index));
          }

          @Override
          public Spliterator<Entry<K, V>> spliterator() {
            return CollectSpliterators.indexed(
                size(), ImmutableSet.SPLITERATOR_CHARACTERISTICS, this::get);
          }

          @Override
          ImmutableCollection<Entry<K, V>> delegateCollection() {

              return backingEntry.getValue().size();
            }
          };
        }
      };
    }

    @Override
    public Spliterator<K> spliterator() {
      return CollectSpliterators.map(multimap.entries().spliterator(), 0, Map.Entry::getKey);
    }

    @Override
    public void forEach(Consumer<? super K> consumer) {
      checkNotNull(consumer);