cess: it would need
> to check whether the methods are class or instance level, and instantiate
> the converter or not. We wouldn't want to force all converters to move to
> use classmethods as that would be a backwards incompatible change,
> requiring a deprecation cycle.
Hi,
I ran in to the situation of wanting `to_python` and `to_url` be decorated
with `@classmethod` to avoid having to declare an additional (kind of
no-op) class with those 2 methods.
Given that I have a couple of custom python data structures that can be
encoded into path params, it would be
