anchor.diff:      end,
       {noreply, State};
   handle_info(Msg, State) ->
  -    twig:log(notice, "~p received unknown message ~p", [?MODULE, Msg]),
  +    couch_log:notice("~p received unknown message ~p", [?MODULE, Msg]),
       {noreply, State}.
   
   terminate(_Reason, _State) ->
  
positive.code:     ets:insert(?MODULE, {Ref, Name}),
      {noreply, State};
  handle_cast(Msg, State) ->
      twig:log(notice, "~p received unknown cast ~p", [?MODULE, Msg]),
      {noreply, State}.
  
  handle_info({'DOWN', Ref, _, _, _}=Msg, State) ->
      case ets:lookup(?MODULE, Ref) of
          [] ->
              twig:log(
                  notice,
                  "~p received unknown exit; message was ~p", [?MODULE, Msg]
              );
          [{Ref, Name}] ->
  
negative.code:     {ok, #st{}}.
  
  handle_call(Msg, _From, State) ->
      couch_log:notice("~p received unknown call ~p", [?MODULE, Msg]),
      {noreply, State}.
  
  handle_cast({track, Pid, Name}, State) ->
  