public Notifications withProgressing(String progressing) {
        setProgressing(progressing);
        return this;
    }
<p>
The Amazon Simple Notification Service (Amazon SNS) topic that you want to notify when Elastic Transcoder has
started to process the job.
</p>

@param progressing
       The Amazon Simple Notification Service (Amazon SNS) topic that you want to notify when Elastic Transcoder
       has started to process the job.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-elastictranscoder/src/main/java/com/amazonaws/services/elastictranscoder/model/Notifications.java