# Preparations
# ensure that system log is enabled (`$_CONFIG['Misc']['EnableSystemLog'] = '1';` in the config.php).
# add code $response = null; $headers = $response->getHeaders(); to the kLogger::prepare method.
# add code trigger_error('cause of kLogger::prepare invocation.'); to the UsersEventHandler::SetCustomQuery.
# Test
# login to the adn.console
# go to the {nav User Management > Users} section
# confirm, that "Stack trace" info is shown in the debugger, and this info is properly formatted - each call info is shown on separate line