anchor.diff:  
   -module(couch_replicator_manager).
   -behaviour(gen_server).
  --vsn(1).
  +-vsn(2).
   -behaviour(config_listener).
   
   % public API
  
positive.code: -export([changes_reader/3, changes_reader_cb/3]).
  
  % config_listener callback
  -export([handle_config_change/5]).
  
  -export([handle_db_event/3]).
  
  
negative.code: 
  handle_info({'DOWN', _Ref, _, _, _}, State) ->
      % From a db monitor created by a replication process. Ignore.
      {noreply, State};
  
  handle_info(shutdown, State) ->
  