type 'a t = 'a Lwt.tval return : 'a -> 'a Lwt.tval address_of : channel -> Xs_protocol.address Lwt.tval namespace_of : channel -> (module Namespace.IO) optionServer.1-Ttype 'a t = 'a Lwt.tval return : 'a -> 'a Lwt.tval address_of : channel -> Xs_protocol.address Lwt.tval namespace_of : channel -> (module Namespace.IO) option