You can search for identifiers within the package.
in-package search v0.2.0
type app
type route
type handler
val json_path : string
val doc_path : string
val json_route : string -> route
val doc_route : string -> route
val get : string -> handler -> route
val post : string -> handler -> route
val delete : string -> handler -> route
val put : string -> handler -> route
val options : string -> handler -> route
val head : string -> handler -> route
val patch : string -> handler -> route
val build_routes : route list -> app