public void setAssociationSize(Long associationSize) {
        this.associationSize = associationSize;
    }
<p>
The number of resources that are associated with the custom line item.
</p>

@param associationSize
       The number of resources that are associated with the custom line item.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/CustomLineItemVersionListElement.java