public void setAggregation(String aggregation) {
        this.aggregation = aggregation;
    }
<p>
An aggregation function that specifies how to calculate the value of a numeric field for a topic, Valid values
for this structure are <code>NO_AGGREGATION</code>, <code>SUM</code>, <code>AVERAGE</code>, <code>COUNT</code>,
<code>DISTINCT_COUNT</code>, <code>MAX</code>, <code>MEDIAN</code>, <code>MIN</code>, <code>STDEV</code>,
<code>STDEVP</code>, <code>VAR</code>, and <code>VARP</code>.
</p>

@param aggregation
       An aggregation function that specifies how to calculate the value of a numeric field for a topic, Valid
       values for this structure are <code>NO_AGGREGATION</code>, <code>SUM</code>, <code>AVERAGE</code>,
       <code>COUNT</code>, <code>DISTINCT_COUNT</code>, <code>MAX</code>, <code>MEDIAN</code>, <code>MIN</code>,
       <code>STDEV</code>, <code>STDEVP</code>, <code>VAR</code>, and <code>VARP</code>.
@see NamedFilterAggType
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/TopicNumericRangeFilter.java