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# NSManagedObjectContext.DidMergeChangesAsyncMessage

Posted after a private queue context merges changes from another context, containing object IDs.

```
struct DidMergeChangesAsyncMessage
```

## Overview

Only use this message type for contexts with `NSPrivateQueueConcurrencyType`.
For main queue contexts, use [`NSManagedObjectContext.DidMergeChangesMessage`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesMessage).

## Topics

### Instance Properties

[`let context: NSManagedObjectContext`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/context)

[`let deletedIDs: Set<NSManagedObjectID>`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/deletedIDs)

Object IDs of objects that were deleted during the merge.

[`let historyToken: NSPersistentHistoryToken?`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/historyToken)

The persistent history token representing the state after the merge.

[`let insertedIDs: Set<NSManagedObjectID>`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/insertedIDs)

Object IDs of objects that were inserted during the merge.

[`let invalidatedIDs: Set<NSManagedObjectID>`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/invalidatedIDs)

Object IDs of objects that were invalidated during the merge.

[`let queryGeneration: NSQueryGenerationToken?`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/queryGeneration)

Query generation token after the merge.

[`let refreshedIDs: Set<NSManagedObjectID>`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/refreshedIDs)

Object IDs of objects that were refreshed during the merge.

[`let updatedIDs: Set<NSManagedObjectID>`](/documentation/CoreData/NSManagedObjectContext/DidMergeChangesAsyncMessage/updatedIDs)

Object IDs of objects that were updated during the merge.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

[`AsyncMessage`](/documentation/Foundation/NotificationCenter/AsyncMessage)

---

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