You can search for identifiers within the package.
in-package search v0.2.0
spotlib
Spotlib.Tuple
val map_fst : ('a -> 'b) -> ('a * 'c) -> 'b * 'c
val map_snd : ('a -> 'b) -> ('c * 'a) -> 'c * 'b
module Pervasives : sig ... end