public RightsizingRecommendationMetadata withLookbackPeriodInDays(LookbackPeriodInDays lookbackPeriodInDays) {
        this.lookbackPeriodInDays = lookbackPeriodInDays.toString();
        return this;
    }
<p>
The number of days of previous usage that Amazon Web Services considers when making the recommendation.
</p>

@param lookbackPeriodInDays
       The number of days of previous usage that Amazon Web Services considers when making the recommendation.
@return Returns a reference to this object so that method calls can be chained together.
@see LookbackPeriodInDays
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/RightsizingRecommendationMetadata.java