Parameter Async_smtp__.Cache.Make.1-R

module Key : Core.Identifiable.S

module Args : sig ... end

type t

val open_ : Args.t ‑> t Async.Deferred.Or_error.t

val close : t ‑> unit Async.Deferred.t

val close_finished : t ‑> unit Async.Deferred.t

val is_closed : t ‑> bool

is_closed t should return true iff close t has been called, even if close_finished has not been determined.