Where is the source code of Android Architecture Components?

Can't find the source code of new Android Architecture Components. Was it published? If it was, where?

If the source is in AOSP, please specify which specific repo project should I use with repo sync [PROJ_NAME] in order to get it.

What is repository in Android architecture?

A repository class isolates data sources, such as a Room database and web services, from the rest of the app. The repository class provides a clean API for data access to the rest of the app. Using repositories is a recommended best practice for code separation and architecture.

Which architecture is used in Android?

The most popular android architectures used by developers are the following: MVC (Model — View — Controller) MVP (Model — View — Presenter) MVVM (Model — View — ViewModel)

Here is the source for Lifecycle, Room, Paging and ViewModel.