Which @angular/* package(s) are relevant/related to the feature request?

core

Description

It's sometimes not so easy to unterstand what dependency injection is doing. It would be very helpful if there would be a possibility to better understand which instances of a injectable exist, how the dependency injection tree of a application looks and how the injector / injection hierarchy of a component looks.

Proposed solution

Extend the chrome dev tools plugin for angular with a visualization for the dependency injection tree.

Alternatives considered

Currently i don't have any idea for alternatives.