The PModel constants are currently fixed.

[davidorme]

The PlantsModel uses pyrealm.pmodel.PModel, which takes arguments setting pmodel_consts and core_consts, which are instances of pyrealm.constants.PModelConst and pyrealm.constants.CoreConst. Most of these are very unlikely to change, but we do need to be able to change them. At the moment (over in branch #659 ), the implementation just has this fixed, but we will need a mechanism to update it.

That might most easily be a new entries in the PlantsConsts object allows an arbitrary dictionary that will get passed to PModelConst and CoreConst as kwargs.

Ultimately, we need to look at the overlap between the VE constants and these constants and synchronise them.