public void setBillingGroups(java.util.Collection<String> billingGroups) {
        if (billingGroups == null) {
            this.billingGroups = null;
            return;
        }

        this.billingGroups = new java.util.ArrayList<String>(billingGroups);
    }
<p>
The billing group Amazon Resource Names (ARNs) to retrieve information.
</p>

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