Ubuntu 22.04: Is it possible to get the directory of a specific nautilus window in a script?

Question

I have tried to use this: Is it possible to get the directory of a specific nautilus window in a script?

I used

sudo apt install python3-nautilus

and then followed the suggestions in the previous post for building an extension: ~/.local/share/nautilus-python/extensions/extension.py:

from gi.repository import Nautilus, GObject, Gtk

class ColumnExtension(GObject.GObject, Nautilus.LocationWidgetProvider):
    def __init__(self):
        pass

    def get_widget(self, uri, window):
        window.set_title(uri)

While there's a pycache, perhaps indicating that the extension is running, the window title (wmctrl -lxp) doesn't show the full path.

How do I get this solution running under Ubuntu 22.04?