Expanded class hierarchy of SourceInterface in Backup and Migrate 5.0.x
- interface \Drupal\backup_migrate\Core\Plugin\PluginInterface
- interface \Drupal\backup_migrate\Core\Destination\DestinationInterface
- interface \Drupal\backup_migrate\Core\Source\SourceInterface
- interface \Drupal\backup_migrate\Core\Source\DatabaseSourceInterface