namespace System.Threading.Tasks.Dataflow
{
    public sealed class BatchedJoinBlock<T1, T2, T3> : IDataflowBlock, IReceivableSourceBlock<Tuple<IList<T1>!, IList<T2>!, IList<T3>!>!>, ISourceBlock<Tuple<IList<T1>!, IList<T2>!, IList<T3>!>!>
    {
        public override string! ToString();
    }
}