Util_pure.BatMapLike `modify_result`, except that `f` returns a result.
val modify_result' :
?not_found:'a not_found ->
'a ->
('b -> 'b rresult) ->
('a, 'b) t ->
('a, 'b) t rresultLike `modify_result`, except that `f` returns a result.
val of_list : ('a * 'b) list -> ('a, 'b) tval to_list : ('a, 'b) t -> ('a * 'b) listval has_key : 'a -> ('a, 'b) t -> boolval keys_list : ('a, 'b) t -> 'a listval values_list : ('a, 'b) t -> 'b list