[Pharo-users] Observing changes of regular attributes

Hi, 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