public ListCustomLineItemsFilter withBillingGroups(String... billingGroups) {
        if (this.billingGroups == null) {
            setBillingGroups(new java.util.ArrayList<String>(billingGroups.length));
        }
        for (String ele : billingGroups) {
            this.billingGroups.add(ele);
        }
        return this;
    }
<p>
The billing group Amazon Resource Names (ARNs) to retrieve information.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setBillingGroups(java.util.Collection)} or {@link #withBillingGroups(java.util.Collection)} if you want
to override the existing values.
</p>

@param billingGroups
       The billing group Amazon Resource Names (ARNs) to retrieve information.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/ListCustomLineItemsFilter.java