Codegen.Interfacetype description = Idl.Interface.description = {name : string;namespace : string option;description : string list;version : Rpc.Version.t;}val prepend_arg : t -> 'a Idl.Param.t -> tval all_types : t -> Rpc.Types.boxed_def listval all_errors : t -> Rpc.Types.boxed_def list