Cloning object of subclass type in Kotlin I wanted to be able to define a method to clone an object that is the same type of itself. I define the interface requesting such, but the following does not compile or run. interface Foo { fun copy() : T } class Bar(private val v:Int) : Foo { override fun copy():Bar = Bar(v) } main() { val bar1 = Bar(1) val bar2 = bar1.copy() } If however I write the implementing class in Java, it will compile class Bar implements Foo { private int v; public Bar(int v) {this.v = v;} public...