public void setArn(String arn) {
        this.arn = arn;
    }
<p>
The ARN of the underlying Redshift data share that is being affected by this notification.
</p>

@param arn
       The ARN of the underlying Redshift data share that is being affected by this notification.
aws-java-sdk-dataexchange/src/main/java/com/amazonaws/services/dataexchange/model/RedshiftDataShareDetails.java