---

System.out.println();
System.out.println("Задание 2:");

SmartCache<Integer, String> userCache = new SmartCache<>();

Function<Integer, String> dbLoader = id -> "User_" + id;

userCache.getOrElse(1, dbLoader);
userCache.getOrElse(1, dbLoader);

userCache.preloadAll(List.of(2, 3), dbLoader);