Returns an invalidation context object that defines the portions of the layout that need to be updated.
- macOS 10.11+
The new bounds for the collection view.
An invalidation context that describes the changes to be made. This value is never
The default implementation of this method creates an instance of the class returned by the
invalidation method and initializes it using its
init() method. Subclasses can override this method and configure additional properties of the invalidation context. In your implementation, you must call
super first to get the context object; you can then configure that object and return it.