public InstanceRecommendation withUtilizationMetrics(java.util.Collection<UtilizationMetric> utilizationMetrics) {
        setUtilizationMetrics(utilizationMetrics);
        return this;
    }
<p>
The number of days for which utilization metrics were analyzed for the instance.
</p>

@param lookBackPeriodInDays
       The number of days for which utilization metrics were analyzed for the instance.
aws-java-sdk-computeoptimizer/src/main/java/com/amazonaws/services/computeoptimizer/model/InstanceRecommendation.java