public Observation withCloudWatchEventSource(CloudWatchEventSource cloudWatchEventSource) {
        this.cloudWatchEventSource = cloudWatchEventSource.toString();
        return this;
    }
<p>
The source of the CloudWatch Event.
</p>

@param cloudWatchEventSource
       The source of the CloudWatch Event.
@return Returns a reference to this object so that method calls can be chained together.
@see CloudWatchEventSource
aws-java-sdk-applicationinsights/src/main/java/com/amazonaws/services/applicationinsights/model/Observation.java