public ListPricingRulesAssociatedToPricingPlanRequest withBillingPeriod(String billingPeriod) {
        setBillingPeriod(billingPeriod);
        return this;
    }
<p>
The billing period for which the pricing rule associations are to be listed.
</p>

@param billingPeriod
       The billing period for which the pricing rule associations are to be listed.
@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/ListPricingRulesAssociatedToPricingPlanRequest.java