public void setBillingGroupArn(String billingGroupArn) {
        this.billingGroupArn = billingGroupArn;
    }
<p>
The Amazon Resource Name (ARN) that references the billing group where the custom line item applies to.
</p>

@param billingGroupArn
       The Amazon Resource Name (ARN) that references the billing group where the custom line item applies to.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/CreateCustomLineItemRequest.java