<!---
Generated by https://github.com/polina-c/layerlens
Dependencies that create loop are markes with `!`.
-->

```mermaid
flowchart TD;
_snapshot.dart-->_util.dart;
_snapshot.dart-->model.dart;
_usage_event.dart-->_util.dart;
_usage_event.dart-->model.dart;
usage_tracking.dart-->_snapshot.dart;
usage_tracking.dart-->_usage_event.dart;
usage_tracking.dart-->model.dart;
```