- sdl-wm-iconify-window ...procedure
- sdl-wm-toggle-full-screen ...procedure
- sdl-wm-grab-input ...procedure
- sdl-get-ticks ...procedure
- sdl-delay ...procedure
- timer? ...procedure
This is a type predicate for timers. Since there's no way ATM for you to get a reference to a timer, this will always return #f.