test.scala

sealed trait MyOption[+A] extends Any {
  def isEmpty: Boolean
  def isDefined: Boolean
}

class MySome[+A](val value: A) extends AnyVal with MyOption[A] {
  def isEmpty: Boolean = false
  def isDefined: Boolean = true
}

object MyNone extends MyOption[Nothing] {
  def isEmpty: Boolean = true
  def isDefined: Boolean = false
}