apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java/ItemService/ItemService
class ItemService:  public ItemService(
      final UserInfoHolder userInfoHolder,
      final NamespaceAPI namespaceAPI,
      final ItemAPI itemAPI,
      final ReleaseAPI releaseAPI,
      final @Qualifier("fileTextResolver") ConfigTextResolver fileTextResolver,
      final @Qualifier("propertyResolver") ConfigTextResolver propertyResolver) {
    this.userInfoHolder = userInfoHolder;
    this.namespaceAPI = namespaceAPI;
    this.itemAPI = itemAPI;
    this.releaseAPI = releaseAPI;
    this.fileTextResolver = fileTextResolver;
    this.propertyResolver = propertyResolver;
  }