public Collaboration withArn(String arn) {
        setArn(arn);
        return this;
    }
<p>
The unique ARN for the collaboration.
</p>

@param arn
       The unique ARN for the collaboration.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cleanrooms/src/main/java/com/amazonaws/services/cleanrooms/model/Collaboration.java