It just occured to me that the second and third options are more similar than they initially appear. In both cases you've taken responsibility for the library i

It just occured to me that the second and third options are more similar than they initially appear. In both cases you've taken responsibility for the library in a new way. It's no longer a breaking change for the library authors to break you if you're messing with private state, so you'll need to do some vetting of all changes to the library.