{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"generic_args.args.get(index).and_then(|arg|"}]}
                    generic_args.args.get(index).and_then(|arg| match arg {
                    let index = generics.param_def_id_to_index[&param_def_id] as usize;
                        GenericArg::Lifetime(lt) => rbv.defs.get(&lt.hir_id.local_id).copied(),