anchor.diff:  %%      'activate_rt' message is received).
   -spec on_inactive(message(), state_inactive()) -> state_inactive();
                    ({activate_rt, Neighbors::nodelist:neighborhood()}, state_inactive())
  -                    -> {'$gen_component', [{on_handler, Handler::gen_component:handler()},...], State::state_active()}.
  +                    -> {'$gen_component', [{on_handler, Handler::gen_component:handler()},...],
  +                        State::state_active()}.
   on_inactive({activate_rt, Neighbors}, {inactive, QueuedMessages}) ->
       log:log(info, "[ RT ~.0p ] activating...~n", [comm:this()]),
       comm:send_local(self(), {periodic_rt_rebuild}),
  
positive.code:         true ->
              % TODO: use lookup_fin
              comm:send_local(pid_groups:get_my(dht_node),
                              {?lookup_fin, Key, ?HOPS_TO_DATA(Hops + 1), WrappedMsg});
          false ->
              %% next_hop and nodelist:succ(Neighbors) return different nodes if
              %% key is in the interval of the succ.
              NextHop = case ?RT:next_hop(Neighbors, ERT, Key) of
                            succ -> node:pidX(nodelist:succ(Neighbors));
                            Pid -> Pid
                        end,
              NewMsg = {?lookup_aux, Key, Hops + 1, WrappedMsg},
  
negative.code: % add source information to debug routing damaged messages
  -define(HOPS_TO_DATA(Hops), {comm:this(), Hops}).
  -define(HOPS_FROM_DATA(Data), element(2, Data)).
  -type data() :: {Source::c)mm:mypid(), Hops::non_neg_integer()}.
  -else.
  -define(HOPS_TO_DATA(Hops), Hops).
  -define(HOPS_FROM_DATA(Data), Data).
  