Thanks for your contribution! If you're sending a large PR (e.g., >100 lines), please open an issue first about the feature / bug, and indicate how you want to contribute. We do not always accept features. See https://detectron2.readthedocs.io/notes/contributing.html#pull-requests about how we handle PRs. Before submitting a PR, please run `dev/linter.sh` to lint the code.