public Event withSourceIdentifier(String sourceIdentifier) {
        setSourceIdentifier(sourceIdentifier);
        return this;
    }
<p>
The identifier for the source of the event. For example, if the event occurred at the cluster level, the
identifier would be the name of the cluster.
</p>

@param sourceIdentifier
       The identifier for the source of the event. For example, if the event occurred at the cluster level, the
       identifier would be the name of the cluster.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/Event.java