anchor.diff:      receive
           refresh ->
               error_logger:info_msg("Acceptor refreshing~n"),
  -            ?MODULE:acceptor(ListenSocket, Service, Handler)
  +            ?MODULE:acceptor(ListenSocket, Service, Handler);
  +        stop ->
  +            ok
       after 0      -> acceptor(ListenSocket, Service, Handler)
       end.
  
positive.code: %%                                      {stop, Reason, State}
  %% Description: Handling call messages
  %%--------------------------------------------------------------------
  handle_call(_Request, _From, State) ->
      Reply = ok,
      {reply, Reply, State}.
  
  %%--------------------------------------------------------------------
  %% Function: handle_cast(Msg, State) -> {noreply, State} |
  
negative.code: -behaviour(gen_server).
  
  %% API
  -export([start_link/3, stop/1]).
  
  %% gen_server callbacks
  -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
  