apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/service/ItemService.java/ItemService/findItemsModifiedAfterDate
class ItemService:  public List<Item> findItemsModifiedAfterDate(long namespaceId, Date date) {
    return itemRepository.findByNamespaceIdAndDataChangeLastModifiedTimeGreaterThan(namespaceId, date);
  }