public ColumnTooltipItem withAggregation(AggregationFunction aggregation) {
        setAggregation(aggregation);
        return this;
    }
<p>
The aggregation function of the column tooltip item.
</p>

@param aggregation
       The aggregation function of the column tooltip item.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/ColumnTooltipItem.java