I have my custom event class which implements several listeners
The handleEvent methods of the class depends on a JTree which is created
after files are loaded through a custom JFrame. Thus, I can't register the
listeners in CyActivator.
I instantiated the class, and passed references of the class + a reference
of CyServiceRegistrar through to where my JFrame is being created.
After my files are loaded and my JTree is created, I set the JTree in my
custom event listener class like this: myListeners.setTree(myJTree) and
register the listeners.

However, I run into this issue:
In the case that someone loads JFrame file loader from the app menu to load
the the files a *second* time, the listeners are registered again and thus
my handleEvent methods are called more than once.

I tried unregistering all services when my custom file loader JFrame is
opened like this: serviceRegistrar.unregisterAllServices(myListeners);, but
it fails

Any idea what's going on?

Thanks