Progress bars/indicators in nautilus-python?

I’m developing extensions for Nautilus using nautilus-python and need a way to show progress of an ongoing operation to the user. Nautilus is doing this all the time when large files are copied for example but I can’t find any way of adding a custom operation to such an indicator.
I know that this was possible before version 4.0 using the Nautilus.LocationWidgetProvider, but it has been removed without replacement as stated in the nautilus-python Reference Manual.

Does anyone have ideas on how to achieve such a behaviour with the newest API version?

Just as the manual said, there’s no replacement. Someone needs to write a new API

Okay, so I guess I’ll open an issue on GitLab for this.
Thanks for the confirmation @kabushawarib.