module ServiceState:State_builder.Option_ref
(
Service.CallG.Datatype
)
(
sig
val name :string
val dependencies :State.t list
end
)
include State_builder.Ref
val memo : ?change:(data -> data) -> (unit -> data) -> data
None
),
it is possible to change with change
.val map : (data -> data) -> data option
val may : (data -> unit) -> unit
val get_option : unit -> data option