{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"#[instrument(level"}]}
        #[instrument(level = "trace", skip(self), ret)]
    impl<'tcx> ty::TypeVisitor<TyCtxt<'tcx>> for OpaqueTypeLifetimeCollector<'tcx> {
        fn visit_region(&mut self, r: ty::Region<'tcx>) {