{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"find_attr!(tcx.get_all_attrs(did),"}]}
            find_attr!(tcx.get_all_attrs(did), AttributeKind::TargetFeature(_, span) => *span)
        let span =
                .unwrap_or_else(|| tcx.def_span(did));