public void setArn(String arn) {
        this.arn = arn;
    }
<p>
The full Amazon Resource Name (ARN) for the route.
</p>

@param arn
       The full Amazon Resource Name (ARN) for the route.
aws-java-sdk-appmesh/src/main/java/com/amazonaws/services/appmesh/model/RouteRef.java