anchor.diff: -% @copyright 2012-2014 Zuse Institute Berlin,
  +% @copyright 2012-2015 Zuse Institute Berlin,
   
   %   Licensed under the Apache License, Version 2.0 (the "License");
   %   you may not use this file except in compliance with the License.
  
positive.code: %%                              epoch=OldEpoch,version=OldVersion,timeout=OldTimeout} = Old,
  %%                      New, Writer) ->
  %%     fun(prbr_bottom, _WriteFilter, Next) ->
  %%             {false, {lease_does_not_exist, pbr_bottom, Next}};
  %%         (Current, _WriteFilter, Next) when Current =:= New ->
  %%             log:pal("re-write in CC:~n~w~n~w~n~w~n~w~n~w~n", [Current, Next, Old, New, Writer]),
  %%             {true, null};
  
negative.code:     fun(Current, _WriteFilter, Next) ->
              case Current of
                  % check for prbr_bottom 
  %                {prbr_bottom, _WriteFilter, _Next} ->
                  prbr_bottom ->
                      {false, {lease_does_not_exist, prbr_bottom, Next}};
                  % check for re-write
                  New -> % Current =:= New
                      log:pal("re-write in CC:~n~w~n~w~n~w~n~w~n~w~n", 
  