apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/NamespaceService.java/NamespaceService/publicAppNamespaceHasAssociatedNamespace
class NamespaceService:  public boolean publicAppNamespaceHasAssociatedNamespace(String publicNamespaceName, Env env) {
    return namespaceAPI.countPublicAppNamespaceAssociatedNamespaces(env, publicNamespaceName) > 0;
  }