def post_validation(self, config: Config, key_name: str) -> None:
        """
        After all options have passed validation, perform a post-validation
        process to do any additional changes dependent on other config values.

        The post-validation process method should be implemented by subclasses.
        """

        After all options have passed validation, perform a post-validation
        process to do any additional changes dependent on other config values.

        The post-validation process method should be implemented by subclasses.
        
mkdocs/config/base.py