public java.util.List<String> getBillingGroups() {
        return billingGroups;
    }
<p>
The billing group Amazon Resource Names (ARNs) to retrieve information.
</p>

@return The billing group Amazon Resource Names (ARNs) to retrieve information.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/ListCustomLineItemsFilter.java