anchor.diff:  
   -define(SERVER, ?MODULE). 
   
  --record(state, {socket}).
  +-record(state, {socket, methods = []}).
   
   %%%===================================================================
   %%% API
  
positive.code: %%--------------------------------------------------------------------
  start_link() ->
      gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
  
  %%%===================================================================
  %%% gen_server callbacks
  
negative.code: -vsn("1.0.0").
  
  %% API
  -export([start_link/0, add_method/3, delete_method/1]).
  
  %% gen_server callbacks
  -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
  