How to use a new backbone?

[wxpppppp0621]

Hi, thank you for your wonderful work, but I have a question for you. I would appreciate it if you could answer it.

I have two questions :

1. If I want to use a backbone that is not included in the original code, what modifications do I need to make?
2. I'm not sure how the configuration files in the configs/_base_/models/ directory are written. How do I need to modify them if I want to write a file based on a different backbone?