set.clear();
    }

    @Override
    Iterator<Entry<K, V>> entryIterator() {
      return asMapEntryIterator(set, function);
    }

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

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