public void setLastRefreshTimestamp(java.util.Date lastRefreshTimestamp) {
        this.lastRefreshTimestamp = lastRefreshTimestamp;
    }
<p>
The time when the recommendation was last generated.
</p>

@param lastRefreshTimestamp
       The time when the recommendation was last generated.
aws-java-sdk-costoptimizationhub/src/main/java/com/amazonaws/services/costoptimizationhub/model/Recommendation.java