These files are a template how to add a new nm-setting-* implementation.
We are not going to add new files to the deprecated libnm-util library,
hence a template for libnm-util is pointless.
libnm-core doesn't have a corresponding template file. Personally, I
don't think such a template are a great idea either, because
- People are not aware that it exists. Hence, it's unused, badly
maintained and quite possibly does not follow current best practice.
- Just copy an actual settings implementation and start from there.
That seems better to me than having a template.
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