map -package:containers is:exact -package:basement -package:conduit -package:base-prelude -package:blaze-html -package:os-string -package:ghc -package:imports -package:dlist -package:filepath -package:pipes -package:base-compat -package:aeson 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.