{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"f.param_list().into_iter().flat_map(|it|"}]}
        f.param_list().into_iter().flat_map(|it| it.params()).for_each(|param| {
    let mut extract_params = |f: ast::Fn| {
            if let Some(pat) = param.pat() {