@Override
        Map<K, V> map() {
          return AsMapView.this;
        }

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

    @Override
    public void forEach(BiConsumer<? super K, ? super V> action) {
      checkNotNull(action);

        }

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

  static <K extends @Nullable Object, V extends @Nullable Object>
      Iterator<Entry<K, V>> asMapEntryIterator(Set<K> set, Function<? super K, V> function) {