NSCollectionLayoutGroupCustomItem
An item used in a group with a custom layout arrangement.
Declaration
@MainActor class NSCollectionLayoutGroupCustomItemOverview
You use a custom item if you want to specify a layout with a custom arrangement, like a radial or diagonal layout. You use custom items within a group that’s created with custom(layoutSize:itemProvider:).
Instead of providing a layout size for the custom item, like you do when you create an NSCollectionLayoutItem, you provide a frame instead.