https://www.vokal.io/blog/reactive-forms-with-rxandroid
https://gist.github.com/hzsweers/b9e25e244d59d7e3274b
https://academy.realm.io/posts/donn-felker-reactive-android-ui-programming-with-rxbinding/
https://placona.co.uk/building-a-beautifully-smart-form-in-android-using-rxjava/
https://academy.realm.io/posts/donn-felker-reactive-android-ui-programming-with-rxbinding/