return fromMultimap.size();
    }

    @Override
    Collection<V2> createValues() {
      return Collections2.transform(
          fromMultimap.entries(), Maps.<K, V1, V2>asEntryToValueFunction(transformer));
    }
  }

  private static final class TransformedEntriesListMultimap<
          K extends @Nullable Object, V1 extends @Nullable Object, V2 extends @Nullable Object>