DescriptorCommand1 example

'input_definition_3' => new InputDefinition([new InputOption('option_name', 'o', InputOption::VALUE_NONE)]),
            'input_definition_4' => new InputDefinition([
                new InputArgument('argument_name', InputArgument::REQUIRED),
                new InputOption('option_name', 'o', InputOption::VALUE_NONE),
            ]),
        ];
    }

    public static function getCommands()
    {
        return [
            'command_1' => new DescriptorCommand1(),
            'command_2' => new DescriptorCommand2(),
        ];
    }

    public static function getApplications()
    {
        return [
            'application_1' => new DescriptorApplication1(),
            'application_2' => new DescriptorApplication2(),
        ];
    }
}

namespace Symfony\Component\Console\Tests\Fixtures;

use Symfony\Component\Console\Application;

class DescriptorApplication2 extends Application
{
    public function __construct()
    {
        parent::__construct('My Symfony application', 'v1.0');
        $this->add(new DescriptorCommand1());
        $this->add(new DescriptorCommand2());
        $this->add(new DescriptorCommand3());
        $this->add(new DescriptorCommand4());
    }
}