PhpBench\Util\TimeUnit::validateMode PHP Method

    private static function validateMode($mode)
    {
        $validModes = [self::MODE_THROUGHPUT, self::MODE_TIME];
        if (!in_array($mode, $validModes)) {
            throw new \InvalidArgumentException(sprintf('Time mode must be one of "%s", got "%s"', implode('", "', $validModes), $mode));
        }
    }