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
