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 : char -> char
val uppercase : char -> char
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 pp : Stdlib.Format.formatter -> char -> unit
val show : char -> string
val isAlpha : char -> bool
val isAlnum : char -> bool
val isWord : char -> bool
val isLower : char -> bool
val isUpper : char -> bool
val isDigit : char -> bool
val isXDigit : char -> bool
val isBlank : char -> bool