[Pharo-project] Announcements question

Hi, I'm using AXAnnouncements but I suppose this question is valid for other implementations. In SASE (the "triggerEvent" event framework) one could subscribe an event for an object specifying an argument at registration time: eventSource when: #eventName send: #aSelector to: anObject with: argument I've looked at Announcements and it seems this kind of registration isn't supported without using blocks. Am I right? Before getting into details I just want to check. What people do to specify an argument at registration time with Announcements? Cheers, Hernán