public class AsyncWork implements GenericWork<future>{

        private ExecutorService ex = Executors.newFixedThreadPool(2);

        @Override
        public FutureKind<String> get(){
            return FutureKind.widen(Future.ofSupplier(ex, () -> "load data asynchronously"));
        }

        @Override
        public FutureKind<Boolean> save(String data){
            return FutureKind.widen((Future.ofSupplier(ex,()->true)));
        }
}