apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java/AdminServiceAPI/getNamespaceLockOwner
class AdminServiceAPI:    public NamespaceLockDTO getNamespaceLockOwner(String appId, Env env, String clusterName, String namespaceName) {
      return restTemplate.get(env, "apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/lock",
          NamespaceLockDTO.class,
          appId, clusterName, namespaceName);

    }