Why haven't we an abstraction class for dynamics in refact code?
I found convenient to have an abstraction for dynamics model, as cost model case. The main reason is to reuse dynamics model along different cost models.
For instance, I would like to be able to unit-test dynamics models alone, however it's only possible inside action models. Instead, unit-testing an action model doesn't make sense to me.
This was a feature in devel branch which I still believe it's convenient