anchor.diff:  -spec recreate_shard(Shard :: string()) -> ok.
   recreate_shard(Shard) ->
       ServerRef = enterdb_ns:get(Shard),
  -    gen_server:call(ServerRef, recreate_shard).
  +    gen_server:cast(ServerRef, recreate_shard).
   
   %%--------------------------------------------------------------------
   %% @doc
  
positive.code: %%                                  {stop, Reason, State}
  %% @end
  %%--------------------------------------------------------------------
  handle_cast(_Msg, State) ->
      {noreply, State}.
  
  
negative.code: 	   readoptions = ReadOptions} = State,
      Reply = leveldb:read_range_n(DB, ReadOptions, StartKey, N),
      {reply, Reply, State};
  handle_call({approximate_sizes, Ranges}, _From, #state{db_ref = DB} = State) ->
      R = leveldb:approximate_sizes(DB, Ranges),
      {reply, R, State};
  