Refactor the code to leverage Mixins

[SMoraisAnsys]

I'm pretty sure there are a lot of common methods or snippets that are in multiple classes.
It would be great if we could come up with some Mixin classes to add reusable functionality to multiple classes without creating deep inheritance hierarchies. Typically, such class are small, contain additional methods and should not be instantiated on its own.

The first PR related to this kind of refactoring is #5755 with the boundary creation.