Batch.dart
↑ Kato Shinya myConsciousness
↑ https://pub.dev/packages/batch/versions/0.0.1
↑ https://github.com/batch-dart/batch.dart
↑ https://github.com/batch-dart/batch.dart/blob/main/LICENSE
↑ https://pub.dev/packages/batch#14-logging
↑ https://github.com/batch-dart/batch.dart/blob/main/design/sequence.md