anchor.diff:  -spec(status(atom()) ->
                list()).
   status(Id) ->
  -    gen_server:call(Id, {status}).
  +    gen_server:call(Id, {status}, ?DEF_TIMEOUT).
   
   
   %% @doc Direct to start a compaction.
  
positive.code: -spec(first(atom()) ->
               {ok, list()} | {error, any()}).
  first(Id) ->
      gen_server:call(Id, {first}).
  
  
  %% Retrieve status from backend-db.
  
negative.code:                 tmp_handler  :: pid(),
                  handler      :: pid()}).
  
  -define(DEF_TIMEOUT, 30000).
  
  %%--------------------------------------------------------------------
  %% API
  %%--------------------------------------------------------------------
  