I saw it in the dropdown, but you didn't select it. What happens when you choose an event name? What gets printed?
Also, excuse me if this was mentioned; I didn't see it. I see you've got plans for types. What about parameters to functions that must be one of a set of values?
Examples:
chatType in
SendChatMessage
filter in
UnitAura (Though, this one acts like bitwise flags.)
You could even support...
frameType in
CreateFrame
...if only for the base UI types.