anchor.diff:  handle_call(Request, _From, State) ->
       {stop, {notimplemented, Request}, State}.
   
  -handle_cast(start, State = #{port := Port, listeners := Listeners}) ->
  +handle_cast(start, State = #{port := Port,
  +                             listeners := Listeners,
  +                             tls_enabled := false}) ->
       {ok, Pid} = start_cowboy(Port, Listeners),
  +    {noreply, State#{pid => Pid}};
  +handle_cast(start, State = #{port := Port,
  +                             listeners := Listeners,
  +                             tls_enabled := true,
  +                             tls_opts := TLSOpts}) ->
  +    {ok, Pid} = start_cowboy_with_tls(Port, Listeners, TLSOpts),
       {noreply, State#{pid => Pid}};
   handle_cast(Msg, State) ->
       {stop, {notimplemented, Msg}, State}.
  
positive.code:     ?INFO("~p listening on port ~p~n", [?MODULE, Port]),
      cowboy:start_http(?MODULE, Listeners, [{port, Port}], [{env, []}]).
  
  update_cowboy(Routes) ->
      RouteList = lists:flatten(maps:fold(
          fun(_, Route, Acc) ->
  
negative.code: init(_Args) ->
      Port = application:get_env(erl_cowboy, port, 80),
      Listeners = application:get_env(erl_cowboy, listeners, 100),
      TLSEnabled = application:get_env(erl_cowboy, tls_enabled, false),
      TLSOpts = application:get_env(erl_cowboy, tls_opts, undefined),
      gen_server:cast(?MODULE, start),
      {ok, #{port => Port, listeners => Listeners,
             routes => #{},
             tls_enabled => TLSEnabled,
             tls_opts => TLSOpts}}.
  
  handle_call({routing, Key, NewRoute}, _From, State = #{routes := Routes}) ->
      NewRoutes = maps:put(Key, NewRoute, Routes),
  