throw new ISE("Couldn't make outdir[%s].", outDir);
}
final AggregatorFactory[] lowerCaseMetricAggs = new AggregatorFactory[metricAggs.length];
for (int i = 0; i < metricAggs.length; i++) {
lowerCaseMetricAggs[i] = new ToLowerCaseAggregatorFactory(metricAggs[i]);
}
final List<String> mergedDimensions = mergeIndexed(
Lists.transform(
indexes,