Elt : sig ... end
val t_of_sexp : (Base.Sexp.t ‑> 'a Elt.t) ‑> Base.Sexp.t ‑> 'a t_
include Creators_generic with type a t := a t_ with type a elt := a Elt.t with type (elt, z) create_options := (elt, z) create_options_without_first_class_module
val create : ('a, unit ‑> 'a t) create_options
val of_list : ('a, 'a elt list ‑> 'a t) create_options