{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"[]"}]}
            [] autodiff_item: rustc_ast::expand::autodiff_attrs::AutoDiffItem,
            [] name_set: rustc_data_structures::unord::UnordSet<rustc_span::Symbol>,
            [] ordered_name_set: rustc_data_structures::fx::FxIndexSet<rustc_span::Symbol>,