anchor.diff:  
       {noreply, State#state{store=Store}};
   
  +%% @private
   handle_info({backup, _From, _SourceNode, Key, Value}, #state{store=Store0}=State) ->
       %% Write value locally.
       Store = write(Key, Value, Store0),
  
positive.code:             after
                  %% We have to timeout, otherwise we block the gen_server.
                  ?PB_RETRY_TIMEOUT ->
  
                      %% Reply to caller.
                      psend(FromPid, {response, FromRequestId, {error, timeout}}),
  
  
negative.code: 
      {noreply, State#state{store=Store}};
  
  %% @private
  handle_info(_Msg, State) ->
      {noreply, State}.
  
  