{"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
    let cfg_options = loc.krate(db).cfg_options(db);
    let span_map = db.span_map(source.file_id);
    Attrs(RawAttrs::new_expanded(db, &source.value, span_map.as_ref(), cfg_options))