Multi-version dispatch.
The return type varies slightly from Rpc.Pipe_rpc.dispatch
to make it clear
that conversion of each individual element in the returned pipe may fail.
val dispatch_iter_multi : Connection_with_menu.t ‑> query ‑> f:(response Rpc.Pipe_rpc.Pipe_message.t ‑> Rpc.Pipe_rpc.Pipe_response.t) ‑> (Rpc.Pipe_rpc.Id.t, error) Core_kernel.Result.t Core_kernel.Or_error.t Async_kernel.Deferred.t
val versions : unit ‑> Core_kernel.Int.Set.t
All versions supported by dispatch_multi
.
(useful for computing which old versions may be pruned)