public DescribeFleetMetricResult withAggregationField(String aggregationField) {
        setAggregationField(aggregationField);
        return this;
    }
<p>
The field to aggregate.
</p>

@param aggregationField
       The field to aggregate.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/DescribeFleetMetricResult.java