anchor.diff:                                       notsent_acc=UnsentAcc0,
                                        notsent_fun=UnsentFun},
                                false,
  -                             [{refresh_iterator, true}]),
  +                             FoldOpts),
   
            %% IFF the vnode is using an async worker to perform the fold
            %% then sync_command will return error on vnode crash,
  
positive.code: 
      try
          %% Give workers one more chance to abort or get a lock or whatever.
          maybe_call_handoff_started(Module, SrcPartition, SrcNode),
  
           Filter = get_filter(Opts),
           [_Name,Host] = string:tokens(atom_to_list(TargetNode), "@"),
  
negative.code:     end.
  
  %% @private
  %% @doc The optional call to handoff_started/2 allows vnodes
  %% one last chance to abort the handoff process and to supply options
  %% to be passed to the ?FOLD_REQ if not aborted.the function is passed
  %% the source vnode's partition number because the callback does not
  %% have access to the full vnode state at this time. In addition the
  %% worker pid is passed so the vnode may use that information in its
  %% decision to cancel the handoff or not e.g. get a lock on behalf of
  %% the process.
  maybe_call_handoff_started(Module, SrcPartition) ->
      case lists:member({handoff_started, 2}, Module:module_info(exports)) of
          true ->
              WorkerPid = self(),
              case Module:handoff_started(SrcPartition, WorkerPid) of
                  {ok, FoldOpts} ->
                      FoldOpts;
                  {error, max_concurrency} ->
                      %% Handoff of that partition is busy or can't proceed. Stopping with
                      %% max_concurrency will cause this partition to be retried again later.
                      exit({shutdown, max_concurrency});
                  {error, Error} ->
                      exit({shutdown, Error})
              end;
          false ->
              %% optional callback not implemented, so we carry on, w/ no addition fold options
              []
      end.
  