anchor.diff:    {ok, dict:new()}.
   
   
  +handle_call(stop, _From, State) ->
  +  {stop, normal, stopped, State};
  +
  +
   handle_call({watch, Group, AssetPath, Options}, _From, State) ->
     case dict:find(Group, State) of
       error ->
  
positive.code:       {reply, group_already_exists, State}
    end;
  
  
  handle_call({rebuild, Group}, _From, State) ->
    case dict:find(Group, State) of
      {ok, {AssetPath, Tree, Options}} ->
  
negative.code:     error ->
        {reply, no_group_found, State}
    end.
  
  
  handle_cast(_Msg, State) ->
    {noreply, State}.
  
  
  handle_info(_Info, State) ->
    {noreply, State}.
  
  
  terminate(_Reason, _State) ->
    ok.
  
  code_change(_OldVsn, State, _Extra) ->
    {ok, State}.
  