You can search for identifiers within the package.
in-package search v0.2.0
tube
Tube
module type Pipe = sig ... end
module Make (Material : sig ... end) : Pipe with type t = Material.t
module BoolPipe : Pipe with type t = bool
module StringPipe : Pipe with type t = string
module IntPipe : Pipe with type t = int
module CharPipe : Pipe with type t = char