apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/controller/AppNamespaceController.java/AppNamespaceController/findPublicAppNamespaceAllNamespaces
class AppNamespaceController:  @GetMapping("/appnamespaces/{publicNamespaceName}/namespaces")
  public List<NamespaceDTO> findPublicAppNamespaceAllNamespaces(@PathVariable String publicNamespaceName, Pageable pageable) {

    List<Namespace> namespaces = namespaceService.findPublicAppNamespaceAllNamespaces(publicNamespaceName, pageable);

    return BeanUtils.batchTransform(NamespaceDTO.class, namespaces);
  }