ajoz

class Refined<A : Any>(
    default: A,
    private val errorMsgGen: (A) -> String = {
        "Value: $it does not meet its constraints!"
    },
    private val validator: (A) -> Boolean = { true }
) : ReadWriteProperty<Refined<A>?, A> {
    private var backingField: A = default

    override operator fun getValue(thisRef: Refined<A>?, property: KProperty<*>): A {

ajoz

class Foo {
    // This will not work because its not a static method!
    // You cannot annotate it with @JvmStatic (usable only
    // in objects and companion objects)
    // You have 4 options:
    fun main(args: Array<String>) {
        prinltn("This won't work as expected")
    }
    
    // this will clash with main above during compilation!