Module Time_ns.Span.Option

module Option: sig .. end  with type span := t

type t = private Core_kernel.Std.Int63.t 
val typerep_of_t : t Typerep_lib.Std.Typerep.t
val typename_of_t : t Typerep_lib.Std.Typename.t
include Identifiable
val none : t
val some : t -> t
val is_none : t -> bool
val is_some : t -> bool
val value : t ->
default:t -> t
val value_exn : t -> t
module Stable: sig .. end