map -package:containers -package:imports -package:charset is:exact -package:invertible -package:ghc -package:base -package:base-compat -package:base-compat-batteries -package:integration -package:hedgehog 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.