In the readme, it mentions using toolbox-py which, on pip, is toolbox-py but seems unlikely.
toolbox doesn't seem to contain the Vector object that appears to be coming from the toolbox import.
python-toolbox likewise doesn't seem to contain the entities needed from toolbox.

So far it seems like Vector and Identity must be coming from toolbox but I'm not totally clear about it.

Is this toolbox package one on pypi? Or is it something bespoke / local?