You can search for identifiers within the package.
in-package search v0.2.0
module M : sig ... end
type f201 = (M.f2, M.f0 list * M.f1 list) GuaCaml.Tree.gnext
val apply : M.t -> ?check:bool -> int -> M.f0 list -> M.f1 list -> Wap_exchange.output -> f201 array option