You can search for identifiers within the package.
in-package search v0.2.0
type ident = string
val ident_eq : 'a -> 'a -> bool
type mident = string
module WS : sig ... end
val hash_ident : WS.t
val mk_ident : WS.data -> WS.data
val underscore : WS.data
val hash_mident : WS.t
val mk_mident : WS.data -> WS.data