anchor.diff:  %%%===================================================================
   
   all() -> ?ALL([
  +    concurrent_updates_test,
       user_becoming_groupless_test,
       cycles_elimination_test,
       grand_scenario_test,
  
positive.code:     ?assertUnorderedMatch([<<"group1">>, <<"group2">>], EG2),
      ?assertUnorderedMatch([<<"group1">>, <<"group2">>, <<"group3">>], EG3),
      ?assertUnorderedMatch([<<"group1">>, <<"group2">>, <<"group4">>], EG4),
      ok.
  
  conditional_update_test(Config) ->
  
negative.code: -export([init_per_testcase/2, end_per_testcase/2]).
  -export([grand_scenario_test/1, conditional_update_test/1,
      nested_groups_in_dev_setup_test/1, cycles_elimination_test/1,
      user_becoming_groupless_test/1, concurrent_updates_test/1]).
  
  -define(assertUnorderedMatch(Guard, Expr), (fun() ->
      Sorted = lists:sort(Guard),
  