{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"&ty::Ref(_,"}]}
            &ty::Ref(_, ty, mutability) => match ty.kind() {
            &ty::Adt(adt, args) => (adt, args, None),
                &ty::Adt(adt, args) => (adt, args, Some(mutability)),