apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/client/ApolloOpenApiClient.java/ApolloOpenApiClient/createAppNamespace
class ApolloOpenApiClient:  public OpenAppNamespaceDTO createAppNamespace(OpenAppNamespaceDTO appNamespaceDTO) {
    return namespaceService.createAppNamespace(appNamespaceDTO);
  }