can I modify UI of Unpub?

[AKAPUCH]

thanks to this package, I made private package repo of my own.
I want to add some ui components to basic ui, but main ui code file 'main.dart.js.dart' looks very difficult to modify.
maybe it's javascript literal, variable is named 1 alphabet(a,b,c,d...) and everything composed of line by line.

if this code is purposed not to be modified, it will be very sad thing...

Or is there another way to modify ui or features?

basic ui

official pub.dev ui