{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"break"}]}
                break 'b ctx.lower_params_and_bindings(
                let self_param = body.self_param.and_then(|id| Some((id, params.next()?.clone())));
                    body.params.iter().zip(params).map(|(it, y)| (*it, y.clone())),