module TLS:Sqlexpr_concurrency.THREAD_LOCAL_STATE
with type 'a t := 'a result
type 'a
t
type 'a
key
val new_key : unit -> 'a key
val get : 'a key -> 'a option
val with_value : 'a key ->
'a option ->
(unit -> 'b t) ->
'b t