You can search for identifiers within the package.
in-package search v0.2.0
module type S = sig ... end
module StringMap : Stdlib.Map.S with type key = string
module Array : S with type t = Field.t array
module Map : S with type t = Field.t StringMap.t
module Hashtbl : S with type t = (string, Field.t) Stdlib.Hashtbl.t