Fantastic clearly explained post Elye! I will start incorporating these into my Android app.

I created this cheat sheet for myself based off this post.

The link to it can be found here under the Scoping Functions section: https://docs.google.com/document/d/1ug7PAljE_CjlxWDX4G4Wq5Ia6olvEhxZoYZ2974SYiY/edit?usp=sharing