public async Task <IReadOnlyList <TReply> > QueryGroup <TPrimaryNetContract, TReply>(Func <TPrimaryNetContract, Task <TReply> > funcToCall) { IReadOnlyList <ActorRemoteInfo> actors = await GetActors(); ImmutableList <TReply> .Builder replies = ImmutableList <TReply> .Empty.ToBuilder(); foreach (var remoteInfo in actors) { ActorProxy <TPrimaryNetContract> proxy = await _node.GetActor <TPrimaryNetContract>(remoteInfo.Key); TReply reply = await funcToCall(proxy.Channel); replies.Add(reply); } return((IReadOnlyList <TReply>)replies.ToImmutable()); }