async
fun <T> CoroutineScope.asyncSafelyWithoutExceptions(context: CoroutineContext = EmptyCoroutineContext, start: CoroutineStart = CoroutineStart.DEFAULT, onException: ExceptionHandler<T?> = defaultSafelyWithoutExceptionHandlerWithNull, block: suspend CoroutineScope.() -> T): Deferred<T?>(source)