Do we need bootstrap.js when exporting multiple modules?

[jessgoldq4]

I'm looking at the Advanced API: Startup Code example, and I have a few questions:

1. If I update App2 to include a second button component, , and I expose it as a module, do I have to include it in the component rendered in bootstrap.js?

i.e,

It seems like it's unnecessary; when I removed <LocalButton2 /> from App2's App.js, I can still see in the host app:

which leads me to my next question...

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2. If we're exporting individual components, and we don't need to include each component in App2's App.js, can we just return an import an empty component into App2's bootstrap.js? It seems to work:

It also seems like leaving bootstrap.js in App2 completely empty works too:

What is the best practice here? Thanks

[ScriptedAlchemy]

No only needed on entry points of main apps themselves