anchor.diff:              already_stopped
       end.
   
  -upgrade_to_tls(#transport{socket = Socket, rcv_pid = Pid} = Conn, Props) ->
  +upgrade_to_tls(#transport{} = _Conn, _Props) ->
       not_supported.
  -use_zlib(#transport{rcv_pid = Pid} = Conn, Props) ->
  +
  +use_zlib(#transport{} = _Conn, _Props) ->
       not_supported.
  +
   get_transport(#transport{rcv_pid = Pid}) ->
       gen_server:call(Pid, get_transport).
   
  
positive.code: 
  handle_call(get_transport, _From, State) ->
      {reply, transport(State), State};
  handle_call(stop, _From, #state{url = Socket} = State) ->
      StreamEnd = escalus_stanza:stream_end(),
      send0(transport(State), exml:to_iolist(StreamEnd), State),
      {stop, normal, ok, State}.
  
negative.code:     #xmlelement{name = <<"body">>, attrs=common_attrs(Rid, Sid) ++ [
              {<<"content">>, <<"text/xml; charset=utf-8">>},
              {<<"xmlns:xmpp">>, <<"urn:xmpp:xbosh">>},
              {<<"xmpp:version">>, Version},
              {<<"hold">>, <<"1">>},
              {<<"wait">>, <<"60">>},
              {<<"xml:lang">>, Lang},
  