anchor.diff:  end_per_suite(_Config) ->
       ok.
   
  -init_per_group(wait_free_group, Config) ->
  -    [{crdt_rsm, wf_crdt_paxos} | Config];
  -init_per_group(_Group, Config) ->
  -    [{crdt_rsm, crdt_paxos} | Config].
  +init_per_group(Group, Config) ->
  +    case lists:member(Group, ?IMPLEMENTATIONS) of
  +        true -> [{crdt_rsm, Group} | Config];
  +        false -> Config
  +    end.
   
   end_per_group(_Group, _Config) ->
       ok.
  
positive.code: 
      %% Start writers
      WriterCount = randoms:rand_uniform(1, 20),
      Count = 100 div WriterCount,
      WriteFun = fun (_) ->
                      gcounter_on_cseq:inc(Key)
                 end,
  
negative.code:     UnitTestPid = self(),
  
      Parallel = randoms:rand_uniform(1, 10),
      Count = (?CMD_PER_TEST div 10) div Parallel,
      WriteFun = fun(_I) -> ok = gcounter_on_cseq:inc(Key) end,
  
      _ = spawn_writers(UnitTestPid, Parallel, Count, WriteFun, TraceId),
  