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# com.apple.developer.app-migration.data-container-access

An entitlement required for app extensions to perform a one-time transfer of on-device data to or from another platform.

## Discussion

Use this entitlement with the app extension that implements the <doc://com.apple.documentation/documentation/AppMigrationKit/AppMigrationExtension> protocol from the <doc://com.apple.documentation/documentation/AppMigrationKit> framework.

The value of this entitlement is an array of strings.
Populate this value with a one-item array containing the bundle identifier of the extension’s containing app.
No other values are valid.

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