public void setMonitorArnList(java.util.Collection<String> monitorArnList) {
        if (monitorArnList == null) {
            this.monitorArnList = null;
            return;
        }

        this.monitorArnList = new java.util.ArrayList<String>(monitorArnList);
    }
<p>
A list of cost anomaly monitor ARNs.
</p>

@param monitorArnList
       A list of cost anomaly monitor ARNs.
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/UpdateAnomalySubscriptionRequest.java