     bottomNavBar.alignment = .centered
 
     // Add items to the bottom navigation bar.
-    let tabBarItem1 = UITabBarItem(title: "Home", image: UIImage(named: "Home"), tag: 0)
-    let tabBarItem2 =
-      UITabBarItem(title: "Messages", image: UIImage(named: "Email"), tag: 0)
+    tabBarItem1.accessibilityValue = "New items"
+
     bottomNavBar.items = [ tabBarItem1, tabBarItem2 ]
 
     // Select a bottom navigation bar item.

    super.viewWillAppear(animated)
    self.navigationController?.setNavigationBarHidden(true, animated: animated)
  }
}

// MARK: Catalog by convention

import MaterialComponents.MaterialBottomNavigation_Theming
import MaterialComponents.MaterialContainerScheme

class BottomNavigationNilBadges : UIViewController, MDCBottomNavigationBarDelegate {

  @objc var containerScheme: MDCContainerScheming = MDCContainerScheme()

  // Create a bottom navigation bar to add to a view.
  let bottomNavBar = MDCBottomNavigationBar()
  let tabBarItem1 = UITabBarItem(title: "Home", image: UIImage(named: "Home"), tag: 0)
  let tabBarItem2 = UITabBarItem(title: "Messages", image: UIImage(named: "Email"), tag: 0)

  init() {
    super.init(nibName: nil, bundle: nil)
