Sorry if this has been asked before.  I'm new to the user list, and I find it difficult to search the archives.

How can I add a contextListener in a logback.groovy config file?

On this page: http://logback.qos.ch/manual/configuration.html#contextListener
It talks about adding a context listener specifically to deal with LevelChangePropogator.

I'd like to do this, but I generally prefer the groovy syntax to the xml syntax.

This page: http://logback.qos.ch/manual/groovy.html
Talks a lot about the groovy syntax, but it doesn't specifically mention how to set up a contextListener.
How can I do it?

I have tried some things I thought would work, but they didn't.

Groovy Version: 2.0.0
Logback Classic: 1.0.0

Thanks,
Pepper