val create : unit -> 'a tval is_empty : 'a t -> boolval add : 'a t -> 'a elt -> unitval add_iter : 'a t -> (('a elt -> unit) -> 'x -> unit) -> 'x -> unitval min_elt : 'a t -> 'a elt optionval get_min_elt : 'a t -> 'a eltval pop_min : 'a t -> 'a elt optionval remove_min : 'a t -> unitval of_array : 'a elt array -> 'a tval of_list : 'a elt list -> 'a tval of_iter : (('a elt -> unit) -> 'x -> unit) -> 'x -> 'a tval iter_unordered : ('a elt -> unit) -> 'a t -> unitval fold_unordered : ('acc -> 'a elt -> 'acc) -> 'acc -> 'a t -> 'acc