Initializer (kafka 2.8.1 API)

Type Parameters:

VA - aggregate value type
```
public interface Initializer<VA>
```
The Initializer interface for creating an initial value in aggregations. Initializer is used in combination with Aggregator.

See Also:

Aggregator, KGroupedStream.aggregate(Initializer, Aggregator), KGroupedStream.aggregate(Initializer, Aggregator, Materialized), TimeWindowedKStream.aggregate(Initializer, Aggregator), TimeWindowedKStream.aggregate(Initializer, Aggregator, Materialized), SessionWindowedKStream.aggregate(Initializer, Aggregator, Merger), SessionWindowedKStream.aggregate(Initializer, Aggregator, Merger, Materialized)

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  VA apply()
  Return the initial value for an aggregation.

- Method Detail
  - apply
```
VA apply()
```
    Return the initial value for an aggregation.
    
    Returns:
    
    the initial value for an aggregation