apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/NamespaceLockService.java/NamespaceLockService/getNamespaceLock
class NamespaceLockService:  public NamespaceLockDTO getNamespaceLock(String appId, Env env, String clusterName, String namespaceName) {
    return namespaceLockAPI.getNamespaceLockOwner(appId, env, clusterName, namespaceName);
  }