Pimcore\Placeholder::addPlaceholderClassPrefix PHP Метод

    public static function addPlaceholderClassPrefix($classPrefix)
    {
        if (!is_string($classPrefix) || $classPrefix == '') {
            throw new \Exception('$classPrefix has to be a valid string and mustn\'t be empty');
        }
        self::$placeholderClassPrefixes[] = $classPrefix;
    }