What is the purpose of the Ember.Container

Question

Can anyone explain what the purpose of the Container module is in the latest Ember?

An example of its usage, in the setup and in the start of this test:

Answer 1

Intended for internal use.

Not meant to be public API

https://github.com/emberjs/ember.js/commit/5becdc4467573f80a5c5dbb51d97c6b9239714a8