public function printParameters($parameters)
    {
        $length = 0;
        foreach ($parameters as $parameter => $description) {
            if ($length == 0) {
                $length = strlen($parameter);
            }
            if (strlen($parameter) > $length) {
                $length = strlen($parameter);
            }
        }

        print Color::head('Options:') . PHP_EOL;
        foreach ($parameters as $parameter => $description) {
            print Color::colorize(' --' . $parameter . str_repeat(' ', $length - strlen($parameter)), Color::FG_GREEN);
            print Color::colorize("    " . $description) . PHP_EOL;
        }
    }