{"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"non_macro_attr:"}]}
            non_macro_attr: arenas
            dummy_ext_derive: Arc::new(SyntaxExtension::dummy_derive(edition)),
                .alloc_macro(MacroData::new(Arc::new(SyntaxExtension::non_macro_attr(edition)))),