anchor.diff:  
       _ = [ begin
                 New = N+100,
  -              Old = case N of
  -                        1 -> 1;
  -                        _ -> N+99
  -                    end,
  +              {ok, Old} = kv_on_cseq:read(Key),
   
                 modify_rbr_at_key(R, N+100),
                 %% ct:pal("After modification:"),
  
positive.code:                     {Old, New}; %% valid for next read
                  New ->
                      {New, New}; %% old is no longer acceptable
                  _ -> ?equals(Val, New)
              end
      end.
  
  
negative.code:               drop_prbr_read),
  
              {ok, Val} = kv_on_cseq:read(Key),
              io:format("Old: ~p, Val: ~p New: ~p", [Old, Val, New]),
              receive
                  {drop_prbr_read, done} ->
                      gen_component:bp_del(ExcludedDHTNode, drop_prbr_read),
  