"Clock" room object class... Does it really exist?

In the Room System Reference page on the mod wiki there is a class of objects called "Clocks" listed but this class of objects does not appear to be used in any of the game's room.xml files. Does anybody know if this class of objects really exists, (and if so, how did the makers of the modding wiki find out about it)?

http://dredmod.com/wiki/Room_System_Reference#clock

 

By getting into the game's innards. I'm not sure right now but I think it was Null who did it.

 

Any idea if it actually works?

 

I have never tried so I can't give you a guarantee, but it ought to, seeing as it is unlikely for it to have been pulled out of nowhere.

If you want to save time on this particular issue, I recommend asking sir Nicholas directly, as the only people outside of devs who would know are the one who pulled it out of the code (and that might or might not have been Null, and he isn't the most active person nowadays) and possibly the ones who work on room mods (Ruigi, lccorp2, r_b_bergstrom).