map -package:text -package:bytestring -package:blaze-html -package:insert-ordered-containers -package:basement -package:base-compat -package:dense-linear-algebra -package:charset -package:hedgehog -package:filepath -package:invertible -package:containers -package:base-compat-batteries -package:ghc package:case-insensitive is:exact

map :: FoldCase s2 => (s1 -> s2) -> CI s1 -> CI s2
case-insensitive Data.CaseInsensitive
Transform the original string-like value but keep it case insensitive.