{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"ExpnKind::Macro(MacroKind::Attr,"}]}
                        ExpnKind::Macro(MacroKind::Attr, _) => {
                    let msg: Cow<'static, _> = match trace.kind {
                            "this procedural macro expansion".into()