extension in the Utils.swift should be marked as public

[tomisacat]

extensions and methods in Utils.swift should be marked as public so you don't have to repeat in demo project.

[lkzhao]

This is something that was considered. The reason why we are not doing it is because exporting these helper methods might cause conflict if you use libraries like SwifterSwift. Feel free to grab the file and put it into your own projects. or include a helper library like SwifterSwift