anchor.diff:  
           undefined ->
               {reply, {error, undefined}, State}
  -    end;
  -
  -handle_call(Request, From, State) ->
  -    error_logger:warning_msg("SYN[~p] Received from ~p an unknown call message: ~p", [node(), Request, From]),
  -    {reply, undefined, State}.
  +    end.
   
   %% ----------------------------------------------------------------------------------------------------------
   %% Cast messages
  
positive.code: handle_info({nodeup, RemoteNode}, State) ->
      error_logger:info_msg("SYN[~p] Node ~p has joined the cluster, sending announce message", [node(), RemoteNode]),
      cast_to_node(RemoteNode, {'3.0', announce, self()}, State),
      {noreply, State};
  
  handle_info(Info, State) ->
      error_logger:warning_msg("SYN[~p] Received an unknown info message: ~p", [node(), Info]),
      {noreply, State}.
  
  %% ----------------------------------------------------------------------------------------------------------
  
negative.code:             %% -> monitor
              _MRef = monitor(process, RemoteScopePid),
              {noreply, State#state{nodes = Nodes#{RemoteScopeNode => RemoteScopePid}}}
      end.
  
  %% ----------------------------------------------------------------------------------------------------------
  %% Info messages
  