setListener

fun setListener(onStartCountdown: () -> Unit = {}, onCountdownUpdate: (millisElapsed: Long) -> Unit = {}, onFinishCountdown: () -> Unit = {}, onIntervalShowing: () -> Unit = {}, onStimulusShowing: () -> Unit = {}, onInvalidReaction: () -> Unit = {}, onReactionDelayUpdate: (millisElapsed: Long) -> Unit = {}, onStimulusHidden: () -> Unit = {}, onCompleteTest: () -> Unit = {}, onResults: (resultsJson: String) -> Unit = {})