-- This boot file exists only to tie the knot between
-- TcUnify and TcSimplify
-unifyType :: TcType.TcTauType -> TcType.TcTauType -> TcRnTypes.TcM ()
+unifyType :: TcType.TcTauType -> TcType.TcTauType -> TcRnTypes.TcM Coercion.CoercionI
zapToMonotype :: TcType.BoxyType -> TcRnTypes.TcM TcType.TcTauType
+boxyUnify :: TcType.BoxyType -> TcType.BoxyType -> TcRnTypes.TcM Coercion.CoercionI