anchor.diff:  %% @end
   %%--------------------------------------------------------------------
   code_change(_OldVsn, State, _Extra) ->
  -        {ok, State}.
  +    {ok, State}.
   
   %%%===================================================================
   %%% Internal functions
  
positive.code: %%                                  {stop, Reason, State}
  %% @end
  %%--------------------------------------------------------------------
  handle_cast(_Msg, State) ->
          {noreply, State}.
  
  %%--------------------------------------------------------------------
  %% @private
  
negative.code: -spec members() -> [term()].
  members() -> gen_server:call(?SERVER, {members}).
  
  %%% @doc
  %%% Joins a node as barile members.
  %%%
  %%% @spec members() -> term().
  %%% @end
  -spec join_node(node()) -> term().
  join_node(Node) -> gen_server:cast(?SERVER, {join, Node}).
  
  %%% @doc
  %%% Leaves a node from barile members.
  %%%
  %%% @spec members() -> term().
  %%% @end
  -spec leave_node(node()) -> term().
  leave_node(Node) -> gen_server:cast(?SERVER, {leave, Node}).
  
  %%--------------------------------------------------------------------
  %% @doc
  %% Starts the server
  