https://github.com/kubernetes-client/python/blob/1a0cb469528e6b2bdeb3eb2c06945f1c22303dfd/kubernetes/client/api_client.py#L266

and in Apache ecosystem it's called clazz:

https://github.com/search?q=org%3Aapache+clazz&type=code

Just thought it was amusing and wanted to share