anchor.diff:  
   block_trigger(Pid) ->
       fun (Message, _State) ->
  -            %ct:pal("called block_renew~n", []),
               case Message of
                   {l_on_cseq, renew_leases} ->
                       comm:send_local(Pid, Message),
  
positive.code:     test_renew_helper(_Config, ModifyF, WaitF),
      true.
  
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % helper
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  
negative.code: % intercepting and blocking
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  intercept_split_request() ->
      DHTNode = pid_groups:find_a(dht_node),
      % we wait for the next periodic trigger
      gen_component:bp_set_cond(DHTNode, block_split_request(self()), block_split_request).
  
  intercept_split_reply(StepTag) ->
      DHTNode = pid_groups:find_a(dht_node),
      % we wait for the next periodic trigger
      gen_component:bp_set_cond(DHTNode, block_split_reply(self(), StepTag), StepTag).
  
  intercept_lease_renew() ->
      DHTNode = pid_groups:find_a(dht_node),
  