for::getMobileDetectionRulesExtended

public function getMobileDetectionRulesExtended()
    {
        static $rules;

        if (!$rules) {
            // Merge all rules together.
            $rules = array_merge(
                self::$phoneDevices,
                self::$tabletDevices,
                self::$operatingSystems,
                self::$browsers,
                self::$utilities
            );
        }

        return $rules;
    }