protected function convertWriteTimeout(array $options)
    {
        if (version_compare(phpversion('mongo'), '1.4.0', '<')) {
            return $options;
        }

        if (isset($options['wTimeout']) && ! isset($options['wTimeoutMS'])) {
            $options['wTimeoutMS'] = $options['wTimeout'];
            unset($options['wTimeout']);
        }

        return $options;
    }