message: docs: mention for depreciation for `Testbed.get()`
  As mention in for this API, it may be important mention for this to make developers migrate or avoid using it
  PR Close
diff: @@ -359,10 +359,11 @@ Then inject it inside a test by calling `TestBed.inject()` with the service clas
  <div class="alert is-helpful">
  -**Note:** We used to have `TestBed.get()` instead of `TestBed.inject()`.
  -The `get` method wasn't type safe, it always returned `any`, and this is error prone.
  -We decided to migrate to a new function instead of updating the existing one given
  -the large scale use that would have an immense amount of breaking changes.
  +**Note:** `TestBed.get()` was deprecated as of Angular version 9.
  +To help minimize breaking changes, Angular introduces a
  +new function called `TestBed.inject()`, which you should use instead.
  +For information on the removal of `TestBed.get()`,
  +see its entry in the [Deprecations index](guide/deprecations#index).
  </div>
  