As we saw above, there are two main methods to include in your library to integrate it with the Hub: upload files
(`push_to_hub`) and download files (`from_pretrained`). You can implement those methods by yourself but it comes with
caveats. To tackle this, `huggingface_hub` provides a tool that uses class inheritance. Let's see how it works!  
In a lot of cases, a library already implements its model using a Python class. The class contains the properties of