You can search for identifiers within the package.
in-package search v0.2.0
val horiz_vertic : (unit -> 'a) -> (unit -> 'a) -> 'a
val vertic : (unit -> 'a) -> 'a
val sprintf : ('a, unit, string) Stdlib.format -> 'a
val line_length : int Stdlib.ref
val horizontally : unit -> bool