Raise entry.Completed event after iOS keyboard is closed

I followed https://developer.xamarin.com/recipes/cross-platform/xamarin-forms/ios/add-done-to-keyboard/ to add a Done button to iOS keyboard. However, I'm handling entry.Completed event in Xamarin Forms. When 'Done' is hit, this event is not raised. I tried adding Control.EndEditing(true); after Control.ResignFirstResponder();, but it didn't work. Any idea how to trigger entry.Completed?