- emptyTyVarSet, singletonTyVarSet, unionTyVarSets, tyVarListToSet,
- tyVarSetToList, elementOfTyVarSet, minusTyVarSet, isEmptyTyVarSet
+ emptyTyVarSet, singletonTyVarSet, unionTyVarSets,
+ unionManyTyVarSets, intersectTyVarSets, mkTyVarSet,
+ tyVarSetToList, elementOfTyVarSet, minusTyVarSet,
+ isEmptyTyVarSet