From @aranhoide:

> ```
> import com.google.appengine.api.utils.SystemProperty;
>
> [...]
>
> boolean productionController = "lanternctrl".equals(SystemProperty.applicationId.get());
> ```
>
> Of course it would be nicer to have 'lanternctrl' in a constant instead, but I don't think we'd ever needed that so far.

Should we knock this out too?