public void setUsagePrice(Double usagePrice) {
        this.usagePrice = usagePrice;
    }
<p>
The hourly rate at which you're charged for the domain using this Reserved Instance.
</p>

@param usagePrice
       The hourly rate at which you're charged for the domain using this Reserved Instance.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/ReservedInstance.java