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# init(sourceAppIdentifier:sourceVersion:)

Creates a resources import request instance for use in a unit test.

```
init(sourceAppIdentifier: MigrationAppIdentifier, sourceVersion: String)
```

## Parameters

`sourceAppIdentifier`

The application that exported the content.

`sourceVersion`

The data format version provided by the source application.

## Discussion

You only use this initializer when creating unit tests that call [`importResources(from:importRequest:progress:)`](/documentation/AppMigrationKit/AppMigrationTester/AppImportController/importResources(from:importRequest:progress:)).
Don’t use it in your app migration extension.

---

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