Demonstration of asserting events in Kotlin

events.kt

fun main() {
    val foo = Foo()
    val aClass = AClass()
    aClass.OnBaz = foo::Bar

    aClass.Do()

    println(aClass.OnBaz == aClass.OnBaz)
    println(aClass.OnBaz)
}

class Foo {
    fun Bar(message: String) {
        println(message)
    }

}

class AClass {
    var OnBaz: (message: String) -> Unit = { }

    fun Do() {
        OnBaz("Hello, World!")
    }
}