You can search for identifiers within the package.
in-package search v0.2.0
include module type of struct include Stdlib.Char end
val code : char -> int
val chr : int -> char
val escaped : char -> string
val lowercase_ascii : char -> char
val uppercase_ascii : char -> char
type t = char
val compare : t -> t -> int
val equal : t -> t -> bool
val unsafe_chr : int -> char
val uppercase : char -> char
val lowercase : char -> char