isClassPred, isTyVarClassPred, isEqPred,
mkDictTy, tcSplitPredTy_maybe,
isPredTy, isDictTy, tcSplitDFunTy, tcSplitDFunHead, predTyUnique,
isClassPred, isTyVarClassPred, isEqPred,
mkDictTy, tcSplitPredTy_maybe,
isPredTy, isDictTy, tcSplitDFunTy, tcSplitDFunHead, predTyUnique,