Respect\Validation\Rules\KeyNested::getValueFromArray PHP Метод

    private function getValueFromArray($array, $key)
    {
        if (!array_key_exists($key, $array)) {
            $message = sprintf('Cannot select the key %s from the given array', $this->reference);
            throw new ComponentException($message);
        }
        return $array[$key];
    }