Constructs a \Drupal\system\SystemConfigFormBase object.
\Drupal\Core\Config\ConfigFactory $config_factory: The factory for configuration objects.
\Drupal\Core\Config\Context\ContextInterface $context: The configuration context to use.
public function __construct(ConfigFactory $config_factory, ContextInterface $context) {
$this->configFactory = $config_factory;
$this->configFactory
->enterContext($context);
}