Now that we have items created for one list, let's see how we can add multiple Shopping Lists to our app. It's quite similar to what we just did for Items, but before we get started, let's refactor our code so that it becomes easier to add a new Shopping List View Controller.
import UIKit
class BaseTableViewController: UITableViewController {
func requestInput(title: String, message: String, handler:
@escaping (String) -> ()) {
let alert = UIAlertController(title: title,
message: message,
preferredStyle: .alert)
alert.addTextField(configurationHandler: nil)
alert.addAction(UIAlertAction(title...