code: public IpcLogEntry withClientAsg(String asg) {
      this.clientAsg = asg;
      if (clientApp == null || clientCluster == null) {
        ServerGroup group = ServerGroup.parse(asg);
        clientApp = (clientApp == null) ? group.app() : clientApp;
        clientCluster = (clientCluster == null) ? group.cluster() : clientCluster;
      }
      return this;
    }
docs: Set the client ASG for the request. In the case of the server side this will be
  automatically filled in if the {@link NetflixHeader#ASG} is specified on the client
  request. The ASG value must follow the
  <a href="https://github.com/Netflix/iep/tree/master/iep-nflxenv#server-group-settings">
  Frigga server group</a> naming conventions.