map -package:containers -package:ghc -package:base -package:case-insensitive -package:incipit-base -package:imports -package:amazonka-core -package:filepath -package:dlist -package:Cabal-syntax -package:blaze-html -package:base-compat is:exact package:basement
Map all element a from a block to a new block of b
Map all elements in a list