apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/util/OpenApiBeanUtils.java/OpenApiBeanUtils/transformFromApps
class OpenApiBeanUtils:  public static List<OpenAppDTO> transformFromApps(final List<App> apps) {
    if (CollectionUtils.isEmpty(apps)) {
      return Collections.emptyList();
    }
    return apps.stream().map(OpenApiBeanUtils::transformFromApp).collect(Collectors.toList());
  }