How common is it to call the same class method from multiple threads [closed]

I see a lot of tutorials calling threads on stand-alone functions, but we are living in 21st century and most of the time can't live without oop. How common is it in real life to call class methods from multiple threads? Also do we have access to other class members from inside that thread function? Or does it all depend on how you pass parameters into the thread call?

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