anchor.diff:  
   %% @doc Reduce objects from the object-container.
   %% @private
  -compact_fun2({ok, #state{meta_db_id     = MetaDBId,
  +compact_fun2({{ok, NumActive}, #state{meta_db_id     = MetaDBId,
                            object_storage = StorageInfo} = State}) ->
       RootPath       = StorageInfo#backend_info.file_path,
       TmpFilePathRaw = StorageInfo#backend_info.tmp_file_path_raw,
  
positive.code:           key_bin                :: binary(),
            body_bin               :: binary(),
            next_offset            :: integer(),
            fun_has_charge_of_node :: function()
           }).
  
  -define(AVS_FILE_EXT, ".avs").
  
negative.code: is_deleted_rec(_MetaDBId,_Meta0,_Meta1) ->
      false.
  
  %% @doc Reduce unnecessary objects from object-container.
  %% @private
  -spec(do_compact(#metadata{}, #compact_params{}, #state{}) ->
  