How to remove a node from a project's logical view?

Hello,

I've read about how to extend a project's logical view by registering a 
NodeFactory. While this works well, I'm getting some problems when I 
want to configure this behaviour.

I've also registered a customizer to extend the properties wizard of a 
J2SE project type (which I registered the NodeFactory for).

Now I want to show the produced nodes only, if I've set up the 
configuration for it. As the configuration can be removed while the 
project is open, I want to remove the additional node then.

How can I achieve this?

Kind regards
Peter