Which file has this specific code?

[Ollie]

A programmer is working on a project for me and he needs the file that has this string: $('#estimate.country').change

Any help in locating the file is greatly appreciated.

[abantecart]

Maybe  you needed $('#estimate_country_zones') ?

https://github.com/abantecart/abantecart-src/search?utf8=%E2%9C%93&q=%24%28%27%23estimate.country%27%29&type=Code