map -package:containers -is:exact -package:charset -package:bytestring -package:aeson -package:incipit-base -is:exact -is:exact -package:filepath -package:base-compat-batteries is:exact 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.