} else if (keys.length === 1 && keys[0].indexOf('NESTED') > -1) {
                const partialList = JSONSerializer.serializeBucket(keys[0].replace('@NESTED', ''), buckets[i][keys[0]][keys[0].replace('@NESTED', '')].buckets);
                for (let j = 0, { length } = partialList; j < length; j += 1) {
                    partialList[j][alias] = buckets[i].key;
                }