Added to the interface as well

force_bdss/notification_listeners/i_notification_listener_factory.py

-from traits.api import Interface, String, Instance, Type
+from traits.api import Interface, String, Instance, Type, Bool
 from envisage.plugin import Plugin
 
 
@@ -12,6 +12,8 @@ class INotificationListenerFactory(Interface):
 
     name = String()
 
+    ui_visible = Bool()
+
     listener_class = Type(
         "force_bdss.notification_listeners"
         ".base_notification_listener.BaseNotificationListener"