{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"lt_arg_spans.push(arg.span());"}]}
                    lt_arg_spans.push(arg.span());
                if let hir::GenericArg::Lifetime(_) = arg {
                    if lt_arg_spans.len() > self.num_expected_lifetime_args() {