Hello, folks! 
Mike Mahoney has been working as a summer intern with the tidymodels group on resampling, especially for spatial data. One of the projects Mike has been focusing on is adding more support for grouped resampling. One feature that has been mentioned briefly in previous discussion is adding support for stratification in grouped resampling. We are gathering input on how folks might expect this to be implemented or might use it. If you are interested in this topic, please add your thoughts on GitHub here!