public EntityDescription withArn(String arn) {
        setArn(arn);
        return this;
    }
<p>
The entity ARN.
</p>

@param arn
       The entity ARN.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/EntityDescription.java