Filter function for remove only specific unused selectors?

[7iomka]

Hey! Thanks for plugin!
Is it possible to specify a function in the plugin's settings that would take an array of globs as an argument and then perform its normal work, but would additionally check whether the result (an unused selector) matches this glob?
For example i want to delete only bootstrap unused spacing-utilities selectors (https://getbootstrap.com/docs/4.1/utilities/spacing/);
On my projects, I have expanded sass map $spacers with multiple custom variants, and the number of generated lines of code has increased to 10,000 (!), Although the project uses a maximum of 600! In my case, utilitaries classes are used according to good-typing rules only in html (I have a pug template engine).
Advise me how to solve this problem with an easy task?
Thanks for any help!