private function render(OutputInterface $output, array $attributes)
    {
        $out = false;

        foreach ($attributes as $name => $value) {
            if ($out) {
                $output->writeln('');
            }

            $output->write("<comment>$name:</comment>");

            if (is_array($value)) {
                $output->writeln('');

                foreach ($value as $v) {
                    $output->writeln("  - $v");
                }
            } else {
                $output->writeln(" $value");
            }

            $out = true;
        }
    }