anchor.diff:  -export([list_to_bitstring/1, list_to_existing_atom/1, list_to_float/1]).
   -export([list_to_integer/1, list_to_integer/2]).
   -export([list_to_pid/1, list_to_tuple/1, loaded/0]).
  --export([localtime/0, make_ref/0, match_spec_test/3, md5/1, md5_final/1]).
  +-export([localtime/0, make_ref/0, map_size/1, match_spec_test/3, md5/1, md5_final/1]).
   -export([md5_init/0, md5_update/2, module_loaded/1, monitor/2]).
  --export([monitor_node/2, monitor_node/3, nif_error/1, nif_error/2
  -]).
  +-export([monitor_node/2, monitor_node/3, nif_error/1, nif_error/2]).
   -export([node/0, node/1, now/0, phash/2, phash2/1, phash2/2]).
   -export([pid_to_list/1, port_close/1, port_command/2, port_command/3]).
   -export([port_connect/2, port_control/3, port_get_data/1]).
  
positive.code: make_ref() ->
      erlang:nif_error(undefined).
  
  %% match_spec_test/3
  -spec erlang:match_spec_test(P1, P2, P3) -> TestResult when
        P1 :: [term()] | tuple(),
  
negative.code: -export([abs/1, append/2, element/2, get_module_info/2, hd/1,
           is_atom/1, is_binary/1, is_bitstring/1, is_boolean/1,
           is_float/1, is_function/1, is_function/2, is_integer/1,
           is_list/1, is_map/1, is_number/1, is_pid/1, is_port/1, is_record/2,
           is_record/3, is_reference/1, is_tuple/1, load_module/2,
           load_nif/2, localtime_to_universaltime/2, make_fun/3,
           make_tuple/2, make_tuple/3, nodes/1, open_port/2,
  