anchor.diff:      ok = syn:join(GroupName, Pid1),
       ok = syn:join(GroupName, Pid2),
       ok = syn:join(GroupName, PidUnresponsive),
  +    timer:sleep(500),
       %% call
       {Replies, BadPids} = syn:multi_call(GroupName, get_pid_name),
       %% check responses
  
positive.code:             single_node_callback_on_process_exit
          ]},
          {two_nodes_groups, [shuffle], [
              two_nodes_join_monitor_and_unregister,
              two_nodes_local_members,
              two_nodes_publish,
              two_nodes_local_publish,
              two_nodes_multicall
          ]},
          {three_nodes_groups, [shuffle], [
  
negative.code: %% -------------------------------------------------------------------
  all() ->
      [
  %%        {group, single_node_groups},
          {group, two_nodes_groups}
  %%        {group, three_nodes_groups}
      ].
  
  %% -------------------------------------------------------------------
  