anchor.diff:      lists:foreach(fun(Backup) -> psend(Backup, {backup, From, Key, Value}) end, Backups),
   
       %% Send the response to the caller.
  -    gen_server:reply(From, ok),
  +    preply(From, ok),
   
       %% No need to send acknowledgement back to the forwarder: 
       %%  - not needed for control flow.
  
positive.code:             %% under concurrent scheduling.
              {noreply, State}
      end;
  handle_call(_Msg, _From, State) ->
      {reply, ok, State}.
  
  %% @private
  handle_cast({read, From, Key}, #state{nodes=[Primary|_Rest], store=Store}=State) ->
      case node() of 
  
negative.code:     gen_server:start_link({local, ?MODULE}, ?MODULE, [Nodes], []).
  
  write(Key, Value) ->
      %% Get partisan-compatible reference to ourself.
      From = pself(),
  
      gen_server:cast(?MODULE, {write, From, Key, Value}),
  
      receive
          Response ->
  