anchor.diff:          _ ->
               false
       end.
  +
  +-spec max_hashtree_tokens() -> pos_integer().
  +max_hashtree_tokens() ->
  +    app_helper:get_env(riak_kv,
  +                       anti_entropy_max_async, 
  +                       ?DEFAULT_HASHTREE_TOKENS).
   
   %% @private
   %% Get the vnodeid, assigning and storing if necessary
  
positive.code: update_hashtree(Bucket, Key, Val, #state{hashtrees=Trees}) ->
      case get_hashtree_token() of
          true ->
              riak_kv_index_hashtree:async_insert_object({Bucket, Key}, Val, Trees);
          false ->
              riak_kv_index_hashtree:insert_object({Bucket, Key}, Val, Trees),
              put(hashtree_tokens, ?HASHTREE_TOKENS)
      end.
  
  get_hashtree_token() ->
      Tokens = get(hashtree_tokens),
      case Tokens of
          undefined ->
              put(hashtree_tokens, ?HASHTREE_TOKENS - 1),
              true;
          N when N > 0 ->
              put(hashtree_tokens, Tokens - 1),
  
negative.code: -type index() :: non_neg_integer().
  -type state() :: #state{}.
  
  -define(DEFAULT_HASHTREE_TOKENS, 90).
  
  -record(putargs, {returnbody :: boolean(),
                    coord:: boolean(),
  