Constructs a RegionalForm object.
\Drupal\Core\Config\ConfigFactory $config_factory: The factory for configuration objects.
\Drupal\Core\Config\Context\ContextInterface $context: The configuration context used for this configuration object.
\Drupal\Core\Locale\CountryManagerInterface $country_manager: The country manager.
Overrides SystemConfigFormBase::__construct
public function __construct(ConfigFactory $config_factory, ContextInterface $context, CountryManagerInterface $country_manager) {
parent::__construct($config_factory, $context);
$this->countryManager = $country_manager;
}