Example of Deleting Item from Diffable Data Source

DiffableDataSource-DeleteItem.swift

@objc
private func handleGet(_ sender: UIButton) {
    var superview = sender.superview
    while superview != nil {
        if let cell = superview as? UICollectionViewCell {
            guard let indexPath = collectionView.indexPath(for: cell),
                let objectIClickedOnto = diffableDataSource.itemIdentifier(for: indexPath) else { return }
            var snapshot = diffableDataSource.snapshot()
            snapshot.deleteItems([objectIClickedOnto])
            diffableDataSource.apply(snapshot)
            break
        }
        superview = superview?.superview
    }
}