Event Listener API is still a "fuzzy" matter. We are currently exposing the v7-style API, but a redesign is desired.

• e.g. use methods?
• use messages?
• what will the shape of such methods or messages should be? should methods be invoked with a wrapper object or not?

void onSomething(SomethingEvent evt);

vs:

void onSomething(SomethingParam1 smp1, String s2, int i3, ...); 

etc.

Investigate the design decisions and come up with a PoC/Action Plan