Agreed; I will change to @ManagedAttribute`.

> M-m-m. Don't see difference with...

This test adds the JMX proxy; it was intended to make sure the control bus method is still available when proxied (see https://jira.spring.io/browse/INT-2413).

However, your comment does make me think we should expose the `setChannelMappings()` method over JMX too.