anchor.diff:      NewState = State#state{
           subscriptions=NewSubscriptions},
       {reply, {ok, Ref, Piecelist}, NewState}.
  +
   
   %% @private
   handle_cast(_, State) ->
  
positive.code:         array:set(Index, PrevCount - 1, Acc)
      end, Numpeers, Piecelist).
  
  -spec increment(pieceset(), array()) -> array().
  increment(Pieceset, Numpeers) ->
      Piecelist = etorrent_pieceset:to_list(Pieceset),
  
negative.code:         IsMatching(SubPieceset)],
      [send_update(Sub, Numpeers) || Sub <- Matching],
      ok.
  
  
  -spec send_update(#subscription{}, array()) -> ok.
  send_update(Subscription, Numpeers) ->
  