{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"P(ast::NormalAttr::from_ident(Ident::with_dummy_span(sym::rustc_autodiff)));"}]}
            P(ast::NormalAttr::from_ident(Ident::with_dummy_span(sym::rustc_autodiff)));
        let mut rustc_ad_attr =