anchor.diff:      %% Update with result.
       {ok, _} = BindFun(AccId, AccValue, Variables),
   
  -    internal_fold_harness(Variables, Id, Function, AccId, BindFun,
  -                          ReadFun, Value).
  +    internal_fold_harness(Variables, ReadDict, Function, AccId, BindFun).
   
   %% @doc Send responses to waiting threads, via messages.
   %%
  
positive.code:                 {server, undefined, {Address, Ref}} ->
                      gen_server:reply({Address, Ref}, {ok, RThreshold});
                  {fsm, undefined, Address} ->
                      gen_fsm:send_event(Address, {ok, undefined, RThreshold});
                  _ ->
                      From ! Result
              end,
  
negative.code: 
  %% Exported helper functions.
  -export([internal_fold/6,
           internal_fold_harness/5]).
  
  %% Exported utility functions.
  -export([next_key/3,
  