anchor.diff:             ], []},
             %% {fix_queue, [], []}, %% queue as builtin type not supported yet
   
  -          {histogram,
  -           [ {find_smallest_interval, 1}, % private API, needs feeder
  -             {merge_interval, 2}, % private API, needs feeder
  -             {find_largest_window, 2} % needs feeder for correct window size
  -           ],
  -           [ {resize, 1}, % needs feeder
  -             {sliding_window_max, 7} % fed by find_largest_window/2
  -           ]},
             {msg_queue, [], []},
             {pdb, [], []},
             {pid_groups,
  
positive.code:     tester:unregister_value_creator({typedef, rdht_tx, encoded_value}),
      true.
  
  tester_type_check_util(_Config) ->
      Count = 500,
      config:write(no_print_ring_data, true),
      tester:register_type_checker({typedef, histogram, histogram}, histogram, tester_is_valid_histogram),
      tester:register_value_creator({typedef, histogram, histogram}, histogram, tester_create_histogram, 2),
      %% [{modulename, [excludelist = {fun, arity}]}]
      Modules =
          [ {comm,
  
negative.code:         ],
      _ = [ tester:type_check_module(Mod, Excl, ExclPriv, Count)
            || {Mod, Excl, ExclPriv} <- Modules ],
  %% feeders are found automatically - sample explicit call would be:
  %%    tester:test(util, readable_utc_time, 1, 25, [with_feeder]),
  
  