map -package:containers -package:aeson -package:incipit-base -package:amazonka-core -package:conduit -package:base-prelude -package:invertible -package:Cabal-syntax -package:insert-ordered-containers -package:foldl is:exact -package:base-compat-batteries package:basement
Map all element a from a block to a new block of b
Map all elements in a list