Module Persistent_connection = Async_extra.Persistent_connection

module Make (Conn : T) : S with type conn = Conn.t and type address = Conn.Address.t

module Rpc : sig .. end

module Versioned_rpc : S with type conn = Async_extra.Import.Versioned_rpc.Connection_with_menu.t and type address = Core.Std.Host_and_port.t