downRepeating
fun downRepeating( keys: Set<Key>, maxDelay: TimeSpan = 500.milliseconds, minDelay: TimeSpan = 100.milliseconds, delaySteps: Int = 6, callback: suspend (ke: KeyEvent) -> Unit): Cancellable
fun downRepeating( vararg keys: Key, maxDelay: TimeSpan = 500.milliseconds, minDelay: TimeSpan = 100.milliseconds, delaySteps: Int = 6, callback: suspend (ke: KeyEvent) -> Unit): Cancellable
fun downRepeating( key: Key, maxDelay: TimeSpan = 500.milliseconds, minDelay: TimeSpan = 100.milliseconds, delaySteps: Int = 6, callback: suspend (ke: KeyEvent) -> Unit): Cancellable