namespace System.Threading.Tasks.Dataflow
{
    public sealed class BatchedJoinBlock<T1, T2> : IDataflowBlock, IReceivableSourceBlock<Tuple<IList<T1>!, IList<T2>!>!>, ISourceBlock<Tuple<IList<T1>!, IList<T2>!>!>
    {
        public BatchedJoinBlock(int batchSize, GroupingDataflowBlockOptions! dataflowBlockOptions);
    }
}