public void setArn(String arn) {
        this.arn = arn;
    }
<p>
A list of custom line item Amazon Resource Names (ARNs) to retrieve information.
</p>

@param arn
       A list of custom line item Amazon Resource Names (ARNs) to retrieve information.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/CustomLineItemVersionListElement.java