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{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies, FlexibleContexts, GADTs #-}
module FDsFromGivens2 where
class C a b | a -> b where
cop :: a -> b -> ()
data KCC where
KCC :: C Char Char => () -> KCC
f :: C Char [a] => a -> a
f = undefined
bar :: KCC -> a -> a
bar (KCC _) = f
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