public void setBillingGroupArn(String billingGroupArn) {
        this.billingGroupArn = billingGroupArn;
    }
<p>
The ARN of the billing group that the custom line item is applied to.
</p>

@param billingGroupArn
       The ARN of the billing group that the custom line item is applied to.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/UpdateCustomLineItemResult.java