type 'a shared = | Shared of 'a| Single of 'a
type ('a, 'ctx) t_store = {act_get : unit -> 'a array;act_get_shared : unit -> 'a shared array;act_store : 'ctx -> 'a -> int;act_store_shared : 'ctx -> 'a -> int;
}module type Stored = sig ... endmodule type S = sig ... end