| apply_hotfix_file | Apply a hotfix file and inject the patch definitions |
| dummy_child_func | A dummy child function that we will "hotfix" in tests |
| dummy_parent_func | A dummy parent function to test namespace injection |
| inject_patch | Inject a runtime patch into a locked package namespace |
| test_patched_dir | Run testthat tests against a patched package namespace |
| undo_patch | Undo a previously injected patch |