map -package:containers -package:foldl -package:base-prelude -package:Cabal-syntax -package:blaze-html -package:case-insensitive -package:bytestring -package:ghc -package:monoidal-containers -package:incipit-base -package:imports package:basement is:exact
Map all element a from a block to a new block of b
Map all elements in a list