EasyMock fools the compiler about a lot of things, but it isn't quite smart enough to fool the compiler into believing that void is a legal argument type.

If someone possessed a lot of my IOUs and then tomorrow tried top break into my best friends home, I would not have any trouble telling that person, get out immediately, or the IOUs are void.

A lot bit appears to me to be cosmetic, changing some requirements in ways that Banks and other financial institutions will fairly easily innovate around the void.