{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"base_params.sort_by_key(|param|"}]}
    base_params.sort_by_key(|param| param.0);
    let mut base_params = cgp::parameters_for(tcx, parent_args, true);
    if let (_, [duplicate, ..]) = base_params.partition_dedup() {