Allow functions to watch dependencies from outside function directory

In the config docs, we have the option to watch : Function APIs

However, it says:

Only paths inside the function directory are allowed. Don’t use ../ (no parent directory references).

I’m assuming this is a technical limitation, but it would be great if there was a way to watch paths that are located in the parent / outside of the extensions directory. The use case is sharing logic and utilities between the function and the web app or other extensions.