is there a mechanism for observing a change of regular variables?

Normally I would use ValueHolder (or fire announcements manually), but this assumes I can change the code.

For example imagine a method of someone else's package

~~~~~~~~~~~~~~~

FAMIXNamedEntity>>name: aString

�� �� name := aString

~~~~~~~~~~~~~~~

I could simply override the method, but that's very brittle since if I were to update the package it would load the "unmodified" version.

Can I somehow overload the assignment operator? Can I augment methods? Is this even possible?

Thanks,

Peter