map -package:conduit -is:exact -is:exact -package:base -package:basement -package:case-insensitive -package:amazonka-core -package:base-prelude -package:integration -package:blaze-html -package:invertible -package:insert-ordered-containers -package:filepath -package:os-string is:exact package:pipes

Apply a function to all values flowing downstream
map id = cat

map (g . f) = map f >-> map g