anchor.diff:      {ok, Lease} = l_on_cseq:read(LeaseId),
       {PredPid, PredRange, Lease}.
   
  -    
  -
   %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   %
   % join helper
  
positive.code: %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  propose_new_neighbor(_Config) ->
      lease_helper:wait_for_ring_size(4),
      lease_helper:wait_for_correct_ring(),
      MainNode = pid_groups:group_with(dht_node),
      % main node
  
negative.code:     %comm:send_local(RMLeasesPid, Msg),
  
      % what do we expect to happen? takeover and merge should succeed
      wait_for_messages_after(RMLeasesPid, [merge_after_rm_change],
                              fun () ->
                                      comm:send_local(RMLeasesPid, Msg)
                              end),
      ok.
  
  