angular: App module documentation example missing app component import

I’m submitting a…

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Feature request
[ x] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

The documentation at https://angular.io/guide/architecture-modules#ngmodule-metadata shows an example of an app module. There is no import for app component.

Expected behavior

I think import app component needs to be added near top of app module if I understand correctly.

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

n/a

Environment

Angular version: X.Y.Z


Browser:
- [ ] Chrome (desktop) version XX
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: XX  
- Platform:  

Others: