map -package:containers -package:imports -package:Cabal-syntax -package:incipit-base -package:aeson -package:dense-linear-algebra -is:exact -package:foldl -package:monoidal-containers -package:os-string -package:hedgehog package:pipes is:exact

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

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