anchor.diff:                  vnode_options :: list(),
                   returnbody :: boolean(),
                   resobjs :: list(),
  -                allowmult :: boolean()
  +                allowmult :: boolean(),
  +                update_last_modified :: boolean()
                  }).
   
   start(ReqId,RObj,W,DW,Timeout,From) ->
  
positive.code: %% @private
  code_change(_OldVsn, StateName, State, _Extra) -> {ok, StateName, State}.
  
  update_metadata(RObj) ->
      MD0 = riak_object:get_update_metadata(RObj),
      NewMD = case dict:is_key("no_update", MD0) of
          true -> dict:erase("no_update", MD0);
          false -> dict:store(<<"X-Riak-VTag">>,
                         make_vtag(RObj),
                         dict:store(<<"X-Riak-Last-Modified">>,
                                    erlang:now(),
                                    MD0))
      end,
      riak_object:apply_updates(riak_object:update_metadata(RObj, NewMD)).
  
  make_vtag(RObj) ->
  
negative.code: -include_lib("eunit/include/eunit.hrl").
  -include_lib("riak_kv_vnode.hrl").
  -behaviour(gen_fsm).
  -define(DEFAULT_OPTS, [{returnbody, false}, {update_last_modified, true}]).
  -export([start/6,start/7]).
  -export([init/1, handle_event/3, handle_sync_event/4,
           handle_info/3, terminate/3, code_change/4]).
  