self.pattern = self.args.pattern
self.hidden_size = self.args.hidden_size
...
```  
In the snippet above, both the internal logic and the `__init__` signature of the class did not change. This means all existing code snippets for your library will continue to work. To achieve this, we had to:
1. Inherit from the mixin (`PytorchModelHubMixin` in this case).