anchor.diff:  %% fresh_story_with_config(C,[..],fun(FreshConfig, Alice, Bob) ->
   %%
   %% and any queries rewritten to use FreshConfig within this scope
  --spec story_with_config(config(), [user_res()], fun()) -> any().
  +-spec story_with_config(escalus:config(), [escalus_users:resource_spec()], fun()) -> any().
   story_with_config(Config, UserSpecs, StoryFun) ->
       FreshConfig = create_users(Config, UserSpecs),
       escalus_story:story_with_client_list(FreshConfig, UserSpecs,
  
positive.code: %% Creates a fresh spec without creating XMPP users on a server.
  %% It is useful when testing some lower level parts of the protocol
  %% i.e. some stream features. It is side-effect free.
  -spec freshen_specs(config(), [user_res()]) -> [escalus_users:user_spec()].
  freshen_specs(Config, UserSpecs) ->
      Suffix = fresh_suffix(),
      lists:map(fun({UserName, Spec}) -> Spec end,
                freshen_specs(Config, UserSpecs, Suffix)).
  
  -spec freshen_spec(config(), escalus_users:user_name() | user_res()) -> escalus_users:user_spec().
  freshen_spec(Config, {UserName, Res} = UserSpec) ->
      [FreshSpec] = freshen_specs(Config, [{UserName, 1}]),
      FreshSpec;
  
negative.code: -define(WORKER_OVERRUN_TIME, 3000).
  -define(MIN_UNREGISTER_TEMPO, 20000).
  
  %% @doc
  %% Run story with fresh users (non-breaking API).
  %% The genererated fresh usernames will consist of the predefined {username, U} value
  %% prepended to a unique, per-story suffix.
  %% {username, <<"alice">>} -> {username, <<"alice32.632506">>}
  -spec story(escalus:config(), [escalus_users:resource_spec()], fun()) -> any().
  story(Config, UserSpecs, StoryFun) ->
      escalus:story(create_users(Config, UserSpecs), UserSpecs, StoryFun).
  
  %% @doc
  %% See escalus_story:story/3 for the difference between
  %% story/3 and story_with_client_list/3.
  -spec story_with_client_list(escalus:config(), [escalus_users:resource_spec()], fun()) -> any().
  story_with_client_list(Config, UserSpecs, StoryFun) ->
      escalus_story:story_with_client_list(create_users(Config, UserSpecs), UserSpecs, StoryFun).
  
  