owner of kotlin member function

Kotlin can obtain information about the owner of the function and the bound object. Suppose there are the following two classes:

 

class A(){
       fun fa(){}
 }
 class B: A()

val KFunction<*>.ownerClass: KClass<*> get() {       
        return (this as FunctionReference).owner as KClass<*>
}

 The owner type can be obtained through KFunction.ownerClass, and the following is the test result:

A::fa.ownerClass => A::class
 A()::fa.ownerClass => A::class
 B::fa.ownerClass => B::class
 B()::fa.ownerClass => B::class

This is useful in web development, assuming a class is a controller

class PersoController:Controller(){
        fun listAction(){
        }
}

The redirected function can be written like this

redirect(PersonController::listAction)

 Why not just use a string? For example: redirect("person/list"). 

Strings are easy to fall off when refactoring, reducing the chance of making mistakes is improving efficiency. 

Symbols are also commonly used in Ruby to replace strings.