BlogPost_20201112_5.swift

extension MenuViewController: UITableViewDelegate {
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        table.reloadItem(at: indexPath, save: { (item) in
            switch selections.contains(item) {
            case true: selections.remove(item)
            case false: selections.insert(item)
            }
        }, animate: false)
    }
}

// in table handler
func reloadItem(at indexPath: IndexPath, save: (MenuItem) -> Void, animate: Bool = true) {
    let item = dataSource.itemIdentifier(for: indexPath)!
    var snapshot = dataSource.snapshot()
    save(item)
    snapshot.reloadItems([item])
    dataSource.apply(snapshot)
}