public ReaderAggregator(BytesValues.WithOrdinals values) {
   this.values = values;
   this.counts = CacheRecycler.popIntArray(values.ordinals().getNumOrds());
 }
 public ReaderAggregator(ShortFieldData fieldData) {
   this.values = fieldData.values();
   this.counts = CacheRecycler.popIntArray(fieldData.values().length);
 }