val mem : 'a t -> key -> boolval remove : 'a t -> key -> unitval to_seq_values : 'a t -> 'a Seq.tval iter : 'a t -> f:('a -> unit) -> unitval set : 'a t -> key -> 'a -> unitval add_exn : 'a t -> key -> 'a -> unitval find : 'a t -> key -> 'a optionval find_exn : 'a t -> key -> 'aval find_or_add : 'a t -> key -> f:(key -> 'a) -> 'aval fold : 'a t -> init:'b -> f:('a -> 'b -> 'b) -> 'bval foldi : 'a t -> init:'b -> f:(key -> 'a -> 'b -> 'b) -> 'bval of_list_exn : (key * 'a) list -> 'a tval keys : _ t -> key listval filteri_inplace : 'a t -> f:(key:key -> data:'a -> bool) -> unit