How to override the base method of the model in the strongloop framework?

Question

Node.js

Hello everyone. I'm trying to learn the strongloop node framework. I've been poking around the documentation for several days now, and I can't figure out how to override methods on models.
The documentation describes how to create models, how to add methods to them, but how to override is absolutely incomprehensible. Tried standard methods - did not work.
The documentation contains an example, but there the method is overridden in other scripts, and when creating a model, it is not clear how to do this.
https://docs.strongloop.com/pages/viewpage.action?...