class PrecombineGroupingTable implements GroupingTable<K, InputT, AccumT> {

  @VisibleForTesting
  public long size() {
    return size;
  }

    PrecombineGroupingTable(
      long maxSize,
      GroupingKeyCreator<? super K> groupingKeyCreator,
      PairInfo pairInfo,
      Combiner<? super K, InputT, AccumT, ?> combineFn,
      SizeEstimator<? super K> keySizer,
      SizeEstimator<? super AccumT> accumulatorSizer);

}