You can search for identifiers within the package.
in-package search v0.2.0
spectrum
Noexn.Simple
val printf : ('a, Format.formatter, unit, unit) format4 -> 'a
equivalent to Format.printf
Format.printf
val eprintf : ('a, Format.formatter, unit, unit) format4 -> 'a
equivalent to Format.eprintf
Format.eprintf
val sprintf : ('a, Format.formatter, unit, string) format4 -> 'a
equivalent to Format.sprintf
Format.sprintf