You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = {
r : 'a R.t;
feedback : Message.t list;
}
val map : f:('a -> 'b) -> 'a t -> 'b t
val map_loc : f:(Loc.t -> Loc.t) -> 'a t -> 'a t