public void setStopDate(java.util.Date stopDate) {
        this.stopDate = stopDate;
    }
<p>
If the execution already ended, the date the execution stopped.
</p>

@param stopDate
       If the execution already ended, the date the execution stopped.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/ExecutionListItem.java