apply JsonSchema via class decorator (instead of inheritance)

[dz0]

Hi,
our CTO prefers "composition over inheritance" and tries to avoid composition where possible.

How complicated could it be to use class decorators instead of Mixin?

idea explained here -- but maybe you know gotchas than can be for your project?
https://effectivepython.com/2019/12/18/prefer-class-decorators-over-metaclasses