apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/controller/NamespaceController.java/NamespaceController/findPublicAppNamespaces
class NamespaceController:  @GetMapping("/appnamespaces/public")
  public List<AppNamespace> findPublicAppNamespaces() {
    return appNamespaceService.findPublicAppNamespaces();
  }