Implement ConversationManagerService to plugin a custom manager

I'm working on a framework for using OpenWebBeans and it would be very helpful to be able to plugin my custom ConversationManager. Currently the manager is simply instantiated in WebBeansContext like this:

conversationManager = new ConversationManager(this);

Please implement the same logic for loading the ConversationManager as a service. I also didn't find an API way for overriding the instantiated ConversationManager with a new one after the WebBeansContext is instantiated. The initial services constructor parameter doesn't help with this either. I'm still new to the OpenWebBeans implementation and I don't think I know enough to be able to submit a patch to implement this.

Did I miss how I can plugin my own manager with the current implementation?