apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java/ItemService/buildNormalItem
class ItemService:  private ItemDTO buildNormalItem(Long id, Long namespaceId, String key, String value, String comment, int lineNum) {
    ItemDTO item = new ItemDTO(key, value, comment, lineNum);
    item.setId(id);
    item.setNamespaceId(namespaceId);
    return item;
  }