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{-# LANGUAGE TemplateHaskell, TypeOperators #-}
module T7667 where
import Language.Haskell.TH
$( return [ TySynD (mkName "+") [PlainTV (mkName "a") (), PlainTV (mkName "b") ()]
(AppT (AppT (ConT ''Either) (VarT $ mkName "a")) (VarT $ mkName "b")) ] )
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