val is_empty : 'a t -> boolval mem : t -> 'a t -> boolval add : t -> 'a -> 'a t -> 'a tval update : t -> ('a option -> 'a option) -> 'a t -> 'a tval singleton : t -> 'a -> 'a tval remove : t -> 'a t -> 'a tval merge : (t -> 'a option -> 'b option -> 'c option) -> 'a t -> 'b t -> 'c tval union : (t -> 'a -> 'a -> 'a option) -> 'a t -> 'a t -> 'a tval compare : ('a -> 'a -> int) -> 'a t -> 'a t -> intval equal : ('a -> 'a -> bool) -> 'a t -> 'a t -> boolval iter : (t -> 'a -> unit) -> 'a t -> unitval fold : (t -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'bval for_all : (t -> 'a -> bool) -> 'a t -> boolval exists : (t -> 'a -> bool) -> 'a t -> boolval filter : (t -> 'a -> bool) -> 'a t -> 'a tval filter_map : (t -> 'a -> 'b option) -> 'a t -> 'b tval partition : (t -> 'a -> bool) -> 'a t -> 'a t * 'a tval cardinal : 'a t -> intval bindings : 'a t -> (t * 'a) listval min_binding_opt : 'a t -> (t * 'a) optionval max_binding_opt : 'a t -> (t * 'a) optionval choose_opt : 'a t -> (t * 'a) optionval split : t -> 'a t -> 'a t * 'a option * 'a tval find_opt : t -> 'a t -> 'a optionval find_first : (t -> bool) -> 'a t -> t * 'aval find_first_opt : (t -> bool) -> 'a t -> (t * 'a) optionval find_last : (t -> bool) -> 'a t -> t * 'aval find_last_opt : (t -> bool) -> 'a t -> (t * 'a) optionval map : ('a -> 'b) -> 'a t -> 'b tval mapi : (t -> 'a -> 'b) -> 'a t -> 'b tval to_seq : 'a t -> (t * 'a) Seq.tval to_rev_seq : 'a t -> (t * 'a) Seq.tval to_seq_from : t -> 'a t -> (t * 'a) Seq.tval add_seq : (t * 'a) Seq.t -> 'a t -> 'a tval of_seq : (t * 'a) Seq.t -> 'a tval min_binding : 'a t -> (path * 'a) optionval get_min_binding : 'a t -> path * 'aval max_binding : 'a t -> (path * 'a) optionval get_max_binding : 'a t -> string * 'aval choose : 'a t -> (path * 'a) optionval get_any_binding : 'a t -> path * 'aval find : path -> 'a t -> 'a optionval get : path -> 'a t -> 'aval of_list : (path * 'a) list -> 'a t