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;