apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/service/AdminService.java/AdminService/AdminService
class AdminService:  public AdminService(
      final AppService appService,
      final @Lazy AppNamespaceService appNamespaceService,
      final @Lazy ClusterService clusterService,
      final @Lazy NamespaceService namespaceService) {
    this.appService = appService;
    this.appNamespaceService = appNamespaceService;
    this.clusterService = clusterService;
    this.namespaceService = namespaceService;
  }