@Override
    ImmutableSet<K> createKeySet() {
      return new ImmutableMapKeySet<>(this);
    }

    @Override
    ImmutableSet<Entry<K, V>> createEntrySet() {
      final class EntrySetImpl extends ImmutableMapEntrySet<K, V> {
        @Override
        ImmutableMap<K, V> map() {
          return IteratorBasedImmutableMap.this;
        }

        @Override

    }

    @Override
    ImmutableSet<K> createKeySet() {
      return new ImmutableMapKeySet<>(this);
    }

    @Override
    ImmutableSet<Entry<K, V>> createEntrySet() {
      final class EntrySetImpl extends ImmutableMapEntrySet<K, V> {
        @Override
        ImmutableMap<K, V> map() {
          return IteratorBasedImmutableMap.this;
        }

        @Override

      @WeakOuter
      final class EntrySetImpl extends EntrySet<K, V> {
        @Override
        Map<K, V> map() {
          return AsMapView.this;
        }

        @Override
        public Iterator<Entry<K, V>> iterator() {
          return asMapEntryIterator(backingSet(), function);
        }
      }
      return new EntrySetImpl();
    }
  }

      @WeakOuter
      final class EntrySetImpl extends EntrySet<K, V> {
        @Override
        Map<K, V> map() {
          return AsMapView.this;
        }

        @Override
        public Iterator<Entry<K, V>> iterator() {
          return asMapEntryIterator(backingSet(), function);
        }
      }
      return new EntrySetImpl();
    }

    @Override