public java.util.List<OpsAggregator> getAggregators() {
        if (aggregators == null) {
            aggregators = new com.amazonaws.internal.SdkInternalList<OpsAggregator>();
        }
        return aggregators;
    }
<p>
Optional aggregators that return counts of OpsData based on one or more expressions.
</p>

@return Optional aggregators that return counts of OpsData based on one or more expressions.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/GetOpsSummaryRequest.java