map -package:containers -is:exact -package:charset -package:bytestring -is:exact -package:base -package:ghc -package:case-insensitive -package:monoidal-containers -package:base-prelude -package:basement is:exact package:conduit

Apply a transformation to all values in a stream. Subject to fusion
Apply a transformation to all values in a stream. Subject to fusion Since 0.3.0