public RdsReservedInstancesConfiguration withNumberOfInstancesToPurchase(String numberOfInstancesToPurchase) {
        setNumberOfInstancesToPurchase(numberOfInstancesToPurchase);
        return this;
    }
<p>
The number of instances that Amazon Web Services recommends that you purchase.
</p>

@param numberOfInstancesToPurchase
       The number of instances that Amazon Web Services recommends that you purchase.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-costoptimizationhub/src/main/java/com/amazonaws/services/costoptimizationhub/model/RdsReservedInstancesConfiguration.java