public ChangeProgressDetails withStartTime(java.util.Date startTime) {
        setStartTime(startTime);
        return this;
    }
<p>
The time that the configuration change was initiated, in Universal Coordinated Time (UTC).
</p>

@param startTime
       The time that the configuration change was initiated, in Universal Coordinated Time (UTC).
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/ChangeProgressDetails.java