val disjoint : t -> t -> bool
val compare : t -> t -> int
val equal : t -> t -> bool
val subset : t -> t -> bool
val iter : (t -> unit) -> t -> unit
val map : (t -> t) -> t -> t
val fold : (t -> 'a -> 'a) -> t -> 'a -> 'a
val for_all : (t -> bool) -> t -> bool
val exists : (t -> bool) -> t -> bool
val filter : (t -> bool) -> t -> t
val filter_map : (t -> t option) -> t -> t
val partition : (t -> bool) -> t -> t * t
val elements : t -> t list
val min_elt_opt : t -> t option
val max_elt_opt : t -> t option
val choose_opt : t -> t option
val split : t -> t -> t * bool * t
val find_opt : t -> t -> t option
val find_first : (t -> bool) -> t -> t
val find_first_opt : (t -> bool) -> t -> t option
val find_last : (t -> bool) -> t -> t
val find_last_opt : (t -> bool) -> t -> t option
val of_list : t list -> t