anchor.diff:  %%      of processes which are now running but haven't been running before.
   %%      Thus allows a clean start of succeeding test suites.
   %%      Prints information about the processes that have been killed.
  --spec end_per_suite([tuple()]) -> [tuple()].
  +-spec end_per_suite(Config) -> Config when is_subtype(Config, kv_opts()).
   end_per_suite(Config) ->
       ct:pal("Stopping unittest ~p~n", [ct:get_status()]),
       unittest_helper:stop_ring(),
  
positive.code: %% @doc Creates a ring with the given IDs (or IDs returned by the IdFun).
  %%      Passes Options to the supervisor, e.g. to set config variables, specify
  %%      a {config, [{Key, Value},...]} option.
  -spec make_ring_with_ids([?RT:key(),...] | fun(() -> [?RT:key(),...]), Options::[tuple()]) -> pid().
  make_ring_with_ids(Ids, Options) when is_list(Ids) ->
      make_ring_with_ids(fun () -> Ids end, Options);
  make_ring_with_ids(IdsFun, Options) when is_function(IdsFun, 0) ->
  
negative.code: %% @doc Creates a ring with Size rangom IDs.
  %%      Passes Options to the supervisor, e.g. to set config variables, specify
  %%      a {config, [{Key, Value},...]} option.
  -spec make_ring(Size::pos_integer(), Options::kv_opts()) -> pid().
  make_ring(Size, Options) ->
      _ = fix_cwd(),
      error_logger:tty(true),
  