if (!data.aggregations[keys[0]].buckets && keys[0].indexOf('NESTED') > -1) {
                const nestedKeys = Object.keys(data.aggregations[keys[0]]);
                const nested = data.aggregations[keys[0]];
                for (let i = 0, { length } = nestedKeys; i < length; i += 1) {
                    if (nested[nestedKeys[i]].buckets) {