Expanded class hierarchy of AlreadyInstalledException in Zircon Profile 8
- class \Drupal\Core\Installer\Exception\InstallerException extends \Drupal\Core\Installer\Exception\RuntimeException uses StringTranslationTrait
- class \Drupal\Core\Installer\Exception\AlreadyInstalledException
- class \Drupal\Core\Installer\Exception\NoProfilesException