{-# LANGUAGE AllowAmbiguousTypes #-} {-# LANGUAGE DataKinds #-} {-# LANGUAGE IncoherentInstances #-} {-# LANGUAGE LambdaCase #-} {-# LANGUAGE OverloadedStrings #-} {-# LANGUAGE ViewPatterns #-} {-# OPTIONS_GHC -O2 -H 300 #-} {-# OPTIONS_GHC -Wall -Werror #-} {-# OPTIONS_HADDOCK prune, show-extensions #-} -- | Header comment. module Foo () where