[Pharo-project] Events, announcements, etc.

Hello all, I know there has been a fair amount of discussion of event mechanisms; I have not been able to follow all of it, and have probably forgotten most of what I did manage to absorb. That said, I _think_ I am fairly flexible as long as there is some way to trigger events and get messages sent to interested parties. Dolphin calls uses selectors such as #trigger: and #trigger:with:. Pharo has methods called #triggerEvent:, etc. Is that done for a specific reason? Am I walking into any traps by forwarding them to #trigger: and friends? Bill