PhpBrew\Command\DownloadCommand::options PHP Method

    public function options($opts)
    {
        $opts->add('f|force', 'Force extraction');
        $opts->add('old', 'enable old phps (less than 5.3)');
        $opts->add('mirror:', 'Use mirror specific site.');
        DownloadFactory::addOptionsForCommand($opts);
    }