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# init(_:)

Creates a lightweight migration stage with the specified version checksums.

```
convenience init(_ checksums: [String])
```

## Parameters

`checksums`

The array of version checksums.

## Discussion

To determine an object model’s version checksum, use its [`versionChecksum`](/documentation/CoreData/NSManagedObjectModel/versionChecksum) property. Alternatively, you can find the checksum in the versioned model’s `VersionInfo.plist` file or in Xcode’s build log.

---

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