You can search for identifiers within the package.
in-package search v0.2.0
ocaml-basics
Option.Applicative
type 'a t = 'a Kernel.t
module Core : sig ... end
val apply : ('a -> 'b) t -> 'a t -> 'b t
val map : ('a -> 'b) -> 'a t -> 'b t
val pure : 'a -> 'a t
module Infix : sig ... end