public void setStartDateTime(java.util.Date startDateTime) {
        this.startDateTime = startDateTime;
    }
<p>
The date and time that marks the beginning of the range of time for which you want to see utterance metrics.
</p>

@param startDateTime
       The date and time that marks the beginning of the range of time for which you want to see utterance
       metrics.
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/ListUtteranceMetricsRequest.java