anchor.diff:  			= lists:keyfind(cents, #acc_balance.units, AccBalanceRecords),
   	RA1 < Threshold.
   
  -notify_query_bucket() ->
  +query_bucket_notification() ->
   	[{userdata, [{doc, "Query bucket notification"}]}].
   
  -notify_query_bucket(Config) ->
  +query_bucket_notification(Config) ->
   	PackagePrice = 100,
   	PackageSize = 1000,
   	P1 = #price{name = ocs:generate_identity(), type = usage, units = octets,
  
positive.code: 	Request1 = {HostUrl ++ PathHub ++ Id, [Accept, auth_header()]},
  	{ok, {{_, 204, _}, _, []}} = httpc:request(delete, Request1, [], []).
  
  notify_query_service() ->
  	[{userdata, [{doc, "Query service notification"}]}].
  
  notify_query_service(Config) ->
  	HostUrl = ?config(host_url, Config),
  	CollectionUrl = HostUrl ++ ?PathServiceHub,
  	ListenerPort = ?config(listener_port, Config),
  	ListenerServer = "http://localhost:" ++ integer_to_list(ListenerPort),
  	Callback = ListenerServer ++ "/listener/"
  			++ atom_to_list(?MODULE) ++ "/notifyqueryservice",
  	Identity = ocs:generate_identity(),
  	Query = "eventType=ServiceDeleteNotification&id=" ++ Identity,
  	RequestBody = "{\n"
  
negative.code: 	ListenerPort = ?config(listener_port, Config),
  	ListenerServer = "http://localhost:" ++ integer_to_list(ListenerPort),
  	Callback = ListenerServer ++ "/listener/"
  			++ atom_to_list(?MODULE) ++ "/queryproductnotification",
  	Query = "eventType=ProductRemoveNotification&id=" ++ ProdRef1,
  	RequestBody = "{\n"
  			++ "\t\"callback\": \"" ++ Callback ++ "\",\n"
  