Webmozart\Console\Api\Config\CommandConfig::addSubCommandConfig PHP Method

    public function addSubCommandConfig(SubCommandConfig $config)
    {
        // The name is dynamic, so don't store by name
        $this->subCommandConfigs[] = $config;
        $config->setParentConfig($this);
        return $this;
    }

 public function testEditOptionCommand()
 {
     $this->config->addSubCommandConfig($config1 = new OptionCommandConfig('command1', 'a'));
     $this->assertSame($config1, $this->config->editOptionCommand('command1'));
 }