>Probably the nicest way to expose this that fits contemporary sensibilities would be as a lazy sequence that does sensible prefetching and asks the server for

>Probably the nicest way to expose this that fits contemporary sensibilities would be as a lazy sequence that does sensible prefetching and asks the server for more data as it’s iterated through. gRPC's streaming API is a good example. It has backpressure built in and you just need to configure the buffer sizes. Clients just consume items off the stream and async writes will suspend as needed.