{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"#[instrument(level"}]}
        #[instrument(level = "trace", skip(self), ret)]
    impl<'tcx> OpaqueTypeLifetimeCollector<'tcx> {
        fn visit_opaque(&mut self, def_id: DefId, args: GenericArgsRef<'tcx>) {