module type Creators = sig .. end
sig
end
type 'a t
'a
type 'a elt
type ('a, 'z) create_options
('a, 'z)
val create : ('a, unit -> 'a t) create_options
('a, unit -> 'a t) create_options
val of_list : ('a, 'a elt list -> 'a t) create_options
('a, 'a elt list -> 'a t) create_options