anchor.diff:  notifydeletegtt(SessionID, _Env, Input) ->
   	mod_esi:deliver(SessionID, "status: 201 Created\r\n\r\n"),
   	notify_delete_gtt ! Input.
  +
  +-spec querygttnotification(SessionID :: term(), Env :: list(),
  +		Input :: string()) -> any().
  +%% @doc Notification callback for query_gtt_notification test case.
  +querygttnotification(SessionID, _Env, Input) ->
  +	mod_esi:deliver(SessionID, "status: 201 Created\r\n\r\n"),
  +	query_gtt_notification ! Input.
   
   -spec notifyaddpla(SessionID :: term(), Env :: list(),
   		Input :: string()) -> any().
  
positive.code: 	notify_create_service, notify_delete_service, notify_query_service,
  	post_hub_user, delete_hub_user, post_hub_catalog, delete_hub_catalog,
  	notify_create_offer, notify_delete_offer, notify_query_offer,
  	notify_insert_gtt, notify_delete_gtt, notify_add_pla, notify_delete_pla,
  	post_hub_inventory, delete_hub_inventory, notify_product_charge,
  	oauth_authentication].
  
  
negative.code: 		TestCase == notify_create_offer; TestCase == notify_delete_offer;
  		TestCase == notify_query_offer;
  		TestCase == notify_insert_gtt; TestCase == notify_delete_gtt;
  		TestCase == query_gtt_notification;
  		TestCase == notify_add_pla; TestCase == notify_delete_pla ->
  	true = register(TestCase, self()),
  	case inets:start(httpd, [{port, 0},
  