apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/server/service/ServerAppOpenApiService.java/ServerAppOpenApiService/ServerAppOpenApiService
class ServerAppOpenApiService:  public ServerAppOpenApiService(
      PortalSettings portalSettings,
      ClusterService clusterService,
      AppService appService) {
    this.portalSettings = portalSettings;
    this.clusterService = clusterService;
    this.appService = appService;
  }