anchor.diff:  -module(elli_example_callback).
   -export([handle/2, request_complete/9]).
  --export([request_throw/3, request_exit/3, request_error/3]).
  +-export([request_throw/4, request_exit/4, request_error/4]).
   -export([chunk_loop/1]).
   -include("elli.hrl").
   -behaviour(elli_handler).
  
positive.code: 
  
  
  request_complete(Req, Response, AcceptStart, RequestStart,
                   HeadersEnd, BodyEnd, UserEnd, RequestEnd, _Args) ->
      %% io:format(
      %%   "REQUEST: ~s~n"
      %%   "    headers  : ~w us~n"
  
negative.code: 
      ok.
  
  request_throw(_Req, _Exception, _Stack, _Args) ->
      ok.
  
  request_exit(_Req, _Exit, _Stack, _Args) ->
      ok.
  
  request_error(_Req, _Error, _Stack, _Args) ->
      ok.
  