Confused about self.parent

Hello, I am making heavy use of `self.parent` in some code I wrote, but:
1. [searching the docs](https://traitlets.readthedocs.io/en/stable/search.html?q=parent) does not define `parent`
2. searching [the repo](https://github.com/ipython/traitlets) for `def parent` does not yield any results
3. There are a number of red herrings in the search to understand what `self.parent` does and where it is documented because of toy examples in the issues and the docs where we have `class Child` and `Class Parent` where the `Child` class has a slot accessed via `self.parent` ... this is not the `self.parent` that is being heavily used in my Traitlets-based applications... but for the life of me, I cannot remember why I started using it and what the semantics are.

Actually I think [I found it](https://github.com/ipython/traitlets/blob/main/traitlets/config/configurable.py#L47) : it's defined as "The parent Configurable instance of this object." ... ah I think I know the purpose of this... it's to get at the Application class that is the parent of the Configurable class so that you can access slots within the Application... is that correct?