fromMap.entrySet().iterator(), asEntryToEntryFunction(transformer));
    }

    @Override
    @GwtIncompatible("Spliterator")
    Spliterator<Entry<K, V2>> entrySpliterator() {
      return CollectSpliterators.map(
          fromMap.entrySet().spliterator(),
          Spliterator.DISTINCT | Spliterator.NONNULL,
          asEntryToEntryFunction(transformer));
    }

    @Override