LeanMapper\Result::translateStrategy PHP Метод

    private function translateStrategy($strategy)
    {
        if ($strategy === null) {
            $strategy = self::STRATEGY_IN;
        } else {
            if ($strategy !== self::STRATEGY_IN and $strategy !== self::STRATEGY_UNION) {
                throw new InvalidArgumentException("Unsupported SQL strategy given: '{$strategy}'.");
            }
        }
        return $strategy;
    }