How to implement a control class?

Question

Software design

Good afternoon, how to implement a control class, for example, I have a library consisting of many classes.
I want to implement only one feature from it (let's take 10 classes out of 30 to implement these features). How to do it in one class to comply with solid principles?
Maybe there is some kind of pattern that will help these 10 classes (independent) to be connected together without going beyond 1 common class?
Now the mediator comes to mind.
Thank you in advance for your response.

Answer 1

Poorly understood what you are doing, but it seems you are looking for a facade.