```
public interface AggregateFunction
```
Interface used to get the aggregate value of a given collection.
Aggregate functions are used to calculate the aggregate values of the intervals belonging to a given data set domain property.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Object`	`aggregate(List values)`
`Object`	`aggregate(List values, List<Integer> rows)`
`AggregateFunctionType`	`getType()`

Object aggregate(List values,
                 List<Integer> rows)

Interface AggregateFunction