Is it possible to rename the whole Codestar plugin with classes?

I do see that some very good authors use Codestar framework for their themeforest project. But when I inspect their files I can not find any file or CLASS related to codestar fw. The file names and Classes
differ from files that codestar offers…

So my question is for my project how in which way should I integrate codestar (plugin or i am allowed to include in theme core) and how to rename it like other authors?

Thanks

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This was not the best answer for my question but still thank you. Because of your suggestion I got the clue how other authors hide the codestar framework files without renaming it.