public void setStartTime(java.util.Date startTime) {
        this.startTime = startTime;
    }
<p>
The timestamp when notebook execution started.
</p>

@param startTime
       The timestamp when notebook execution started.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/NotebookExecutionSummary.java