anchor.diff:                    args = [?KEY, edis_util:binary_to_integer(Key), edis_util:binary_to_integer(Key)],
                     group = lists, result_type = multi_bulk}).
   
  --spec lrange_n([binary()]) -> undefined.
  +-spec lrange_n([binary()]) -> [binary()].
   lrange_n([Key|_]) ->
     edis_db:run(
       edis_db:process(0),
  
positive.code:     #edis_command{cmd = <<"LPUSHX">>, args = [?KEY, ?KEY],
                    group = lists, result_type = multi_bulk}).
  
  -spec lrange_s([binary()]) -> undefined.
  lrange_s([Key|_]) ->
    edis_db:run(
      edis_db:process(0),
  
negative.code:          quit/0, quit_per_testcase/1, quit_per_round/2]).
  -export([blpop/1, blpop_nothing/1, brpop/1, brpop_nothing/1, brpoplpush/1, lindex/1, linsert/1,
           llen/1, lpop/1, lpush/1, lpushx/1, lrange_s/1, lrange_n/1, lrem_x/1, lrem_y/1, lrem_0/1,
           lset/1, ltrim/1]).
  
  %% ====================================================================
  %% External functions
  