public AggregatedUtterancesSummary withUtteranceFirstRecordedInAggregationDuration(java.util.Date utteranceFirstRecordedInAggregationDuration) {
        setUtteranceFirstRecordedInAggregationDuration(utteranceFirstRecordedInAggregationDuration);
        return this;
    }
<p>
The date and time that the utterance was first recorded in the time window for aggregation. An utterance may have
been sent to Amazon Lex before that time, but only utterances within the time window are counted.
</p>

@param utteranceFirstRecordedInAggregationDuration
       The date and time that the utterance was first recorded in the time window for aggregation. An utterance
       may have been sent to Amazon Lex before that time, but only utterances within the time window are counted.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/AggregatedUtterancesSummary.java