@@ -135,6 +135,7 @@ import Data.Functor.Compose
135import Data.Functor.Constant
135import Data.Functor.Constant
136import Data.Functor.Misc
136import Data.Functor.Misc
137import Data.Functor.Product
137import Data.Functor.Product
138+import Data.GADT.Compare (GCompare)
138import Data.IORef
139import Data.IORef
139import Data.IntMap.Strict (IntMap)
140import Data.IntMap.Strict (IntMap)
140import Data.Maybe
141import Data.Maybe