Mark unused parameters in Kotlin

Question

I am defining some functions to be used as callbacks and not all of them use all their parameters.

How can I mark unused parameters so that the compiler won\'t give

Answer 1

If the functions are part of a class you can declare the containing class open or abstract and the offending methods as open.

open class ClassForCallbacks {
  // no warnings here!
  open fun methodToBeOverriden(a: Int, b: Boolean) {}
}

Or

abstract class ClassForCallbacks {
  // no warnings here!
  open fun methodToBeOverriden(a: Int, b: Boolean) {}
}