Class load event for mods?

I was thinking if there is or could be a way of getting list of classes loaded by mod.

Every time a mod is loaded, there would be event fired with some Collection<Class> allowing other mods to for example read annotations on them.

Or you know - one-to-one event-class firing.

There is obviously order of loading mods so those loaded later might not catch those loaded before them, but this can be solved by either dependency or simply by making snapshot of mod's Collection<Class> and firing event for it at the very end (so when all mods are loaded).

Well, I am open to suggestions as to how this could be made without such event (listing classes on load) or expecting other feedback.

In other news - Forge (mod's) class loader allows to load more classes in runtime (am I the only one doing it?), so if it were for me - make event fire even then (not just in mod inits).