Package support: authoritative list and the exact meaning of "unsupported"

[shundt]

First of all, thanks for mf6adj! It was easy to follow your examples and get the package working on a couple of real models.

I'd now like to apply mf6adj to a GWF model with a LAK boundary condition, and I'm not sure whether LAK is supported (I think not). It appears in neither the paper's list of unsupported packages (MAW, MVR, CSUB, UZF) nor the _gwf_package_types list in adj.py, so I can't tell which way it falls. I'm also unsure exactly what "unsupported" means in practice.

My questions, in short:

1. Is the LAK package supported?
2. Is there a single place to look for a complete list of supported packages?
3. If a package is unsupported, does that mean I can't use mf6adj on that model at all (its presence prevents the adjoint solve or invalidates the sensitivities) or does it just mean I can't define a PM using that package or get sensitivities for its parameters?

Thanks,
Stephen