| Package | Description | 
|---|---|
| com.hazelcast.mapreduce.aggregation.impl | This package contains a set of predefined aggregation implementations | 
| Class and Description | 
|---|
| AggType The internal interface for Aggregation definitions to make those implementations more type-safe. | 
| AvgTuple Internal tuple type for average calculations, used to transmit data between
 Combiner and Reducer implementations. | 
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