Parameter MakePersistence.Backend

type 'a actor = 'a Actor.t
type 'b target = 'b Target.t
type actor_spec = ActorSpec.t
type effect = Effect.t
type kind = TargetRoles.t
type role_set = RoleSet.t
type roles = ActorRoles.t
type rule = Rule.t
type target_spec = TargetSpec.t
type validation_set = ValidationSet.t
type ('rv, 'err) monad = ('rv, 'err) Lwt_result.t
module Repo : sig ... end
val find_migrations : unit -> (string * string * string) list
val find_clean : unit -> (string * string) list
val migrate : ?ctx:(string * string) list -> unit -> unit Lwt.t
val clean : ?ctx:(string * string) list -> unit -> unit Lwt.t