Event that is triggered on an extension of the visible topic list?

Guys,

Newbie question, forgive me:

Is there any event or property update I can hook to that occurs after the topic list is loaded with additional items (and you see the spinner)?

In the code I’m working on I want to be able to trigger a call immediately after that occurs: for this to work it needs to be called after the resulting extended list has completed rendering, I believe.

Thanks!