// presses a key, if not already pressed. does not release
func press(k *gostwriter.K) {
err := k.Press()
guard(err)
}
// releases a key, if not aready released.
func release(k *gostwriter.K) {
err := k.Release()
guard(err)
}
// presses and subsequently releases a key
func push(k *gostwriter.K) {
err := k.Push()
guard(err)
}