4e89dcf031
The key changes include:
- Top interface: `PersistentStorage`
- Implementation:
+ `LazyStorage`
+ `InMemoryStorage`
- Extended functionality:
+ `BasicMap`
+ `PersistentStorageAdapter`
The remaining changes are small cleanups to adapt to the above key
changes.
Test: Existing tests (refactoring change)
Bug: N/A (code cleanup)