{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
        let span = trace_span!("inline", body = %tcx.def_path_str(body.source.def_id()));
    fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
        let _guard = span.enter();