{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
        let Some(def_id) = cx.qpath_res(qpath, func.hir_id).opt_def_id() else { return };
        let hir::ExprKind::Path(qpath) = &func.kind else { return };
        let Some(name) = cx.tcx.get_diagnostic_name(def_id) else { return };