I've started working with request batching, which is a really nice feature. Everything works, but there two improvements I'd like to see.

Firstly, for IReturnVoid requests there is SendAllOneWay, but there is no async version of that method.

Secondly, I'd like to be able to specify a http Verb with the SendAll methods. The implementation should select the correct method in the service, both when calling a single request method multiple times, but also for the batched method. Right now the batched service methods always need to be Any(), it would be nice to be able to have Delete(OrderID[] orders).