anchor.diff:  
   
   load_documents([Document]) -> load_document(Document);
  -load_documents([]) -> {[], [], ?FALLBACK_UDP_CONFIG}.
  +load_documents([]) -> {[], [], ?FALLBACK_UDP_CONFIG, ?FALLBACK_METRICS_DATA_DIR}.
   
   
   load_document(Doc) ->
  
positive.code:          load_config/1,
           get_metadata/1,
           get_udp_config/0,
           udp_is_enabled/1]).
  
  
  -define(STATSER_DEFAULT_CONFIG, "statser.yaml").
  
  -define(FALLBACK_UDP_CONFIG, #udp_config{port=none, interval=10000}).
  
  
negative.code: 
  
  load_storage_from_string_test_() ->
      GetStorage = fun({Storage, _Aggs, _Udp, _Dir}) -> Storage end,
      {setup, fun setup/0,
       [% empty or stub configurations
        ?_assertEqual([], load_from_string("", GetStorage)),
  