package foo interface WithName { var name: String } class GetPropertyName() { fun get(withName: WithName, property: PropertyMetadata): String { return withName.name + ":" + property.name; } fun set(withName: WithName, property: PropertyMetadata, value: String) { withName.name = value + ":" + property.name } } class A : WithName { override var name = "propertyName" val d = GetPropertyName() val a by d var OK by d } fun box(): String { val a = A() if (a.a != "propertyName:a") return "a.a != 'propertyName:a', it: " + a.a if (a.OK != "propertyName:OK") return "a.OK != 'propertyName:aOK', it: " + a.OK a.OK = "property" if (a.a != "property:OK:a") return "a.a != 'property:OK:a', it: " + a.a return "OK" }