You can search for identifiers within the package.
in-package search v0.2.0
type ('a, 'b) t = 'a -> 'b
val compose : ('a -> 'b) -> ('c -> 'd) -> 'e -> 'f
val invcompose : ('a -> 'b) -> ('c -> 'd) -> 'e -> 'f
val apply : ('a -> 'b) -> 'c -> 'd
val map : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b
val id : 'a -> 'b
val flip : ('a -> 'b -> 'c) -> 'd -> 'e -> 'f
val (@@) : ('a -> 'b) -> 'a -> 'b
val (@.) : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b
val (|>) : ('a -> 'b) -> ('b -> 'c) -> 'a -> 'c
module Public : sig ... end