Backend\Core\Engine\Model::checkSettings PHP Method

    public static function checkSettings()
    {
        $warnings = array();
        // check if debug-mode is active
        if (BackendModel::getContainer()->getParameter('kernel.debug')) {
            $warnings[] = array('message' => BackendLanguage::err('DebugModeIsActive'));
        }
        // check if this action is allowed
        if (Authentication::isAllowedAction('Index', 'Settings')) {
            // check if the fork API keys are available
            if (self::get('fork.settings')->get('Core', 'fork_api_private_key') == '' || self::get('fork.settings')->get('Core', 'fork_api_public_key') == '') {
                $warnings[] = array('message' => sprintf(BackendLanguage::err('ForkAPIKeys'), self::createURLForAction('Index', 'Settings')));
            }
        }
        // check for extensions warnings
        $warnings = array_merge($warnings, BackendExtensionsModel::checkSettings());
        return $warnings;
    }