public void setRank(Integer rank) {
        this.rank = rank;
    }
<p>
The rank identifier of the RDS instance recommendation option.
</p>

@param rank
       The rank identifier of the RDS instance recommendation option.
aws-java-sdk-computeoptimizer/src/main/java/com/amazonaws/services/computeoptimizer/model/RDSDatabaseRecommendedOptionProjectedMetric.java