public Long getDesiredStartTime() {
        return this.desiredStartTime;
    }
<p>
The Epoch timestamp when you want the service software update to start. You only need to specify this parameter
if you set <code>ScheduleAt</code> to <code>TIMESTAMP</code>.
</p>

@return The Epoch timestamp when you want the service software update to start. You only need to specify this
        parameter if you set <code>ScheduleAt</code> to <code>TIMESTAMP</code>.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/StartServiceSoftwareUpdateRequest.java