{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"(ty::Ref(region,"}]}
                (ty::Ref(region, referent_ty, _), hir::TyKind::Ref(_lifetime, referent_hir_ty)) => {
                //     - let's call the lifetime of this reference `'1`
                    if region.as_var() == needle_fr {