anchor.diff:  
   %% @doc Get the status information for this eleveldb backend
   -spec status(state()) -> [{atom(), term()}].
  -status(#state{data_root=DataRoot} = State) ->
  -    get_status(DataRoot, State).
  +status(State) ->
  +    {ok, Stats} = eleveldb:status(State#state.ref, <<"leveldb.stats">>),
  +    [{stats, Stats}].
   
   %% @doc Register an asynchronous callback
   -spec callback(reference(), any(), state()) -> {ok, state()}.
  
positive.code: 
  -record(state, {ref :: reference(),
                  data_root :: string(),
                  read_opts = [],
                  write_opts = [],
                  fold_opts = [{fill_cache, false}],
                  write_buffer_size :: integer()}).
  
  -type state() :: #state{}.
  -type config() :: [{atom(), term()}].
  
negative.code:     BKey = sext:encode({Bucket, <<>>}),
      [{first_key, BKey} | FoldOpts].
  
  
  %% @private Given a scope limiter, use sext to encode an expression
  %% that represents the starting key for the scope. For example, since
  