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