anchor.diff:                  buffer_queue=queue:new(),
                   remainder_data :: binary(),
                   free_writers :: ordsets:new(),
  -                unacked_writes=ordsets:new()}).
  +                unacked_writes=ordsets:new(),
  +                all_writer_pids :: list(pid())}).
   
   %%%===================================================================
   %%% API
  
positive.code:                 free_writers=NewFreeWriters2,
                  buffer_queue=NewBufferQueue}.
  
  
  
  
negative.code:     %% it be?
      {ok, TRef} = timer:send_interval(60000, self(), save_manifest),
      {next_state, not_full, State#state{manifest=Manifest,
                                         timer_ref=TRef,
                                         all_writer_pids=WriterPids,
                                         free_writers=FreeWriters}}.
  
  %% when a block is written
  %% and we were already not full,
  