public void setCreationDateTime(java.util.Date creationDateTime) {
        this.creationDateTime = creationDateTime;
    }
<p>
The metric attribution's creation date time.
</p>

@param creationDateTime
       The metric attribution's creation date time.
aws-java-sdk-personalize/src/main/java/com/amazonaws/services/personalize/model/MetricAttributionSummary.java