Message tracing with Content Based Router, to highlight when/otherwise steps

I used the camel-activemq archetype to create a new Fuse project.

I started the project and attached JMX. I enabled Fuse message tracing.
And I created a new message4.xml file and dropped it into the src/data folder.

The tracer worked and I could see the message.

But in the diagram view, it only highlights the choice. We should enhance when using the Content Based Router. To "compute" which when/otherwise the message used. We should be abel to do that, but following the arrows back.

Then show that as sort of "intermediate" step to help end user visualize where the message was routed.

PS: We should also show input / output if possible. I will create another ticket for that.

See screenshot