type t = Stdlib.Set.Make(T).t;
let remove: elt => t => t;
let disjoint: t => t => bool;
let elements: t => list(elt);
let min_elt_opt: t => option(elt);
let max_elt_opt: t => option(elt);
let choose_opt: t => option(elt);
let find_opt: elt => t => option(elt);
let find_first: (elt => bool) => t => elt;
let find_first_opt: (elt => bool) => t => option(elt);
let find_last: (elt => bool) => t => elt;
let find_last_opt: (elt => bool) => t => option(elt);
let iter: (elt => unit) => t => unit;
let fold: (elt => 'acc => 'acc) => t => 'acc => 'acc;
let filter: (elt => bool) => t => t;
let filter_map: (elt => option(elt)) => t => t;
let partition: (elt => bool) => t => (t, t);
let split: elt => t => (t, bool, t);
let mem: elt => t => bool;
let equal: t => t => bool;
let compare: t => t => int;
let subset: t => t => bool;
let for_all: (elt => bool) => t => bool;
let exists: (elt => bool) => t => bool;
let to_list: t => list(elt);
let to_seq_from: elt => t => Stdlib.Seq.t(elt);
let to_seq: t => Stdlib.Seq.t(elt);
let to_rev_seq: t => Stdlib.Seq.t(elt);
let add_seq: Stdlib.Seq.t(elt) => t => t;
let of_seq: Stdlib.Seq.t(elt) => t;
let output: Stdlib.out_channel => t => unit;
let print: Stdlib.Format.formatter => t => unit;
let to_string: t => string;
let of_list: list(elt) => t;