anchor.diff:          {event, <<"myevent4;id=4;o=2">>},
           {class, uac},
           {answered, undefined},
  -        {expires, 1}    % It will be something link round(0.99)
  +        {expires, 1}    % It shuould be something like round(0.99)
       ] = nksip_subscription:fields(C1, Subs1A, [status, event, class, answered, expires]),
   
       [
  
positive.code:     % Another subscription
      {async, _} = 
          nksip_uac:subscribe(C1, SipC2, [{event, "myevent4"}, CB, async, get_request,
                                          {add, Reply}, {add, "x-nk-op", "wait"}, 
                                          {expires, 2}]),
      RecvReq2 = receive {Ref, {wait, Req2}} -> Req2
      after 1000 -> error(fork)
  
negative.code:                                         {contact, "sip:a@127.0.0.1"}, 
                                          {meta, [dialog_id]}]),
      Subs1B = nksip_subscription:remote_id(C1, Subs1A),
      RS1 = {add, "record-route", "<sip:b1@127.0.0.1:5070;lr>,<sip:b@b>,<sip:a2@127.0.0.1;lr>"},
  
      % Now the remote party (the server) sends a NOTIFY, and updates the Route Set
      {ok, 200, []} = nksip_uac:notify(C2, Subs1B, [RS1]),
      [
          {local_target, <<"<sip:a@127.0.0.1>">>},
          {remote_target, <<"<sip:127.0.0.1:5070>">>},
  