Method set_up

src/input.rs:211–217

(&mut self, button: T)

    }

    fn set_up(&mut self, button: T) {
        let was_down = self.down.remove(&button);

        if was_down {
            self.released.insert(button);
        }
    }

    fn is_down(&self, button: T) -> bool {
        self.down.contains(&button)