apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/controller/NamespaceController.java/NamespaceController/getPublicAppNamespaceAllNamespaces
class NamespaceController:  @GetMapping("/envs/{env}/appnamespaces/{publicNamespaceName}/namespaces")
  public List<NamespaceDTO> getPublicAppNamespaceAllNamespaces(@PathVariable String env,
                                                               @PathVariable String publicNamespaceName,
                                                               @RequestParam(name = "page", defaultValue = "0") int page,
                                                               @RequestParam(name = "size", defaultValue = "10") int size) {

    return namespaceService.getPublicAppNamespaceAllNamespaces(Env.valueOf(env), publicNamespaceName, page, size);

  }