public ChainedPartitionAggregatorDeclarer partitionAggregate(ReducerAggregator agg, Fields functionFields) {
return partitionAggregate(null, agg, functionFields);
}
public ChainedPartitionAggregatorDeclarer partitionAggregate(Fields inputFields, ReducerAggregator agg, Fields functionFields) {
return partitionAggregate(inputFields, new ReducerAggregatorImpl(agg), functionFields);
}