[Chapter 13.2.2] Why not including RabbitMQ in the computation of the readiness state

[ongiant]

After reviewing the code in Listing 13.10, I examined the application.yml file within the Dispatcher Service. I didn't come across the management.endpoint.health.group.readiness.include property. I was under the impression that this property should be present and include rabbitmq in the computation of the readiness state. Shouldn't this be the case?