anchor.diff:    {ok, #state{url = Url}}.
   
   
  +handle_call({set, Key, Value}, _From, State = #state{url = Url}) ->
  +  set_conf(Url, Key, Value),
  +  {reply, ok, State};
   handle_call(_Request, _From, State) ->
     {reply, ok, State}.
   
  
positive.code: -spec get_conf(binary()) -> binary().
  get_conf(Var) ->
    get_conf(Var, undefined).
  
  %%--------------------------------------------------------------------
  %% @doc
  
negative.code: -define(CONF_ETS, ss_conf).
  -define(UPDATE_CONF_INTERVAL, 900000). %15 minutes
  
  -record(state, {url :: binary()}).
  
  %%%===================================================================
  %%% API
  