public void setEstimatedROI(String estimatedROI) {
        this.estimatedROI = estimatedROI;
    }
<p>
The estimated return on investment that's based on the recommended Savings Plans and estimated savings.
</p>

@param estimatedROI
       The estimated return on investment that's based on the recommended Savings Plans and estimated savings.
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/SavingsPlansPurchaseRecommendationSummary.java