class CachePopulatorExample extends ConcurrentCachePopulator<String, String> {

  public static void example() {
    Cache<String, String> cache = CacheBuilder.heapCache().build();
    CachePopulatorExample populatorExample = new CachePopulatorExample(cache);
    populatorExample.pupulate();
    System.out.println(cache.get("0"));
  }

  public  CachePopulatorExample(Cache<String, String> cache);

}