You can search for identifiers within the package.
in-package search v0.2.0
val lowercase : string -> string
val uppercase : string -> string
val capitalize : string -> string
val uncapitalize : string -> string
val char_is_uppercase : char -> bool
val rev_split : char -> string -> string list
val split : char -> string -> string list
val bounded_split : char -> string -> int -> string list
val join : string -> string list -> string
val pad_right : char -> string -> int -> string
val has_prefix : string -> string -> bool
val remove_prefix : string -> string -> string
val has_suffix : string -> string -> bool
val remove_suffix : string -> string -> string
val ends_with : string -> string -> bool