Naming convention for third party classes

I'm working with CI 3.1.x which requires that all classes follow the naming convention of first letter UC and the rest lower case.
If I have third party libs installed directly or via composer and they do not follow that naming convention, will I have to modify them to conform, or is it more of just a convention to follow, but is somewhat optional?

It's just a convention to follow, you can use which ever way you like.

What did you Try? What did you Get? What did you Expect?

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