Hi. Im facing an issue with my project.

I have a js file which is used in my custom modules which contains a method _fetchspecialmany2ones

And the same method is on odoo/addons/web/static/src/js/views/basic/basic_model.js

Upto 14 i can see the same folder structure. But from 15 it's restructured

I'm in search of the method but unable to find that. Could someone help me to handle this situation 

Context - upgrading odoo from lower version to higher version