if (result == null) {
        result =
            map =
                Collections.unmodifiableMap(
                    Maps.transformValues(
                        delegate.asMap(), collection -> unmodifiableValueCollection(collection)));
      }
      return result;
    }

    @Override
    public Collection<Entry<K, V>> entries() {
      Collection<Entry<K, V>> result = entries;
      if (result == null) {