Example usage with some random Engine

```rust fn run(mut engine: Engine) { let window = engine.createwindow(WindowBuilder::new())unwrap(); let mut updateloop = UpdateLoop::new(UpdateRate::PerSecond(60));

loop {
    if let Some(event) = engine.poll() {
        event(event);
    } else {
        let delta = update_loop.update(|| {
            update();
        });

        draw();
    }
}

}

fn main() { env_logger::init(); Engine::new().run(run); } ```