public UpdateAnomalySubscriptionRequest withMonitorArnList(String... monitorArnList) {
        if (this.monitorArnList == null) {
            setMonitorArnList(new java.util.ArrayList<String>(monitorArnList.length));
        }
        for (String ele : monitorArnList) {
            this.monitorArnList.add(ele);
        }
        return this;
    }
<p>
A list of cost anomaly monitor ARNs.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setMonitorArnList(java.util.Collection)} or {@link #withMonitorArnList(java.util.Collection)} if you want
to override the existing values.
</p>

@param monitorArnList
       A list of cost anomaly monitor ARNs.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/UpdateAnomalySubscriptionRequest.java