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The QLPreviewPanel class implements the Quick Look preview panel—a user interface object that displays the preview of a list of items.
A Quick Look preview of an item that you can embed into your view hierarchy.
A protocol that defines properties you implement to make your application’s content visible in a QuickLook preview (QLPreviewController in iOS or QLPreviewPanel in macOS).
The QLPreviewPanelDataSource protocol declares the methods that the Quick Look preview panel (QLPreviewPanel) uses to access the contents of its data source object.
QLPreviewPanelDelegate is the protocol for the delegate of the Quick Look preview panel (QLPreviewPanel) object.