I'd like to spend this lesson on some more elaboration of the MVVM architecture model. Ideally, we'll want to set up our RegistrationViewModel object to reflect what we have in our RegistrationController page. This way we can keep track of all the appropriate properties inside a single class. To make our code much easier to write, we'll introduce the construct of a Bindable that allows for binding from external classes. Lots to learn and you'll see these patterns a lot in Reactive style programming.