# QLThumbnailRequestSetDocumentObject(_:_:_:) Stores an object as part of a thumbnail request. ``` func QLThumbnailRequestSetDocumentObject(_ thumbnail: QLThumbnailRequest!, _ object: UnsafeRawPointer!, _ callbacks: UnsafePointer!) ``` ## Parameters `thumbnail` The thumbnail request. `object` The object that you want to associate with the thumbnail request. `callbacks` Callbacks for retaining or releasing the object that you want to store as part of the thumbnail request. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)