anchor.diff:  %% @end 
   %%--------------------------------------------------------------------
   
  -handle_call(get_config, _From, State#state{config=Config}) ->
  -	{reply, Config, State};
  +handle_call(get_config, _From, State) ->
  +	{reply, State#configuration.config, State};
   
   handle_call(_Request, _From, State) ->
       Reply = ok,
  
positive.code: -behaviour(gen_server).
  
  %% API
  -export([start_link/0, get_config/1]).
  
  %% gen_server callbacks
  -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
  
negative.code: %% @end 
  %%--------------------------------------------------------------------
  init(Config) ->
      {ok, #configuration{config=Config}}.
  
  %%--------------------------------------------------------------------
  %% @spec 
  