How to check if a method has been overridden in a data class object in Kotlin?

Question

My problem is differentiating the methods created by the data class with the methods created manually by the person.

I'm trying to find a way to differentiate the methods created by the data class with the methods created by the person to create generic functions. (Ex: toString()) I've already tried using "declaringClass", but it only resolves to class and not to data class.