class Pet(kind: String) : OptionGroup(kind) {
  val name by option()

class Cat : Pet("cat") {
  val declawed by option().flag
}

class Dog : Pet("dog") {
  val floppyEars by option().flag()
}

Duplicate option name --name

--cat-name

sealed class LoadConfig(name: String): OptionGroup(name) {
    val outName by option()
}
class FromDisk : LoadConfig("Options for loading from disk") {
    val path by option().required()
    val followSymlinks by option().flag()
}

class FromNetwork: LoadConfig("Options for loading from network") {
    val url by option().required()
    val username by option().prompt()
    val password by option().prompt(hideInput = true)
}

Duplicate option name --out-name

load