map -package:containers -is:exact -package:charset -package:integration -package:insert-ordered-containers -package:Cabal-syntax -package:base-prelude -package:base-compat-batteries -package:conduit -package:ghc package:case-insensitive

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