{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"GenericArgData::Lifetime(lt)"}]}
                GenericArgData::Lifetime(lt) => self.add_constraints_from_region(lt, variance_i),
            match k.data(Interner) {
                GenericArgData::Ty(ty) => self.add_constraints_from_ty(ty, variance_i),