The "Expanded Parameters blocks" is kind of supported in Kotlin. You can write a function like this: /** * @param arg the string to garble */

The "Expanded Parameters blocks" is kind of supported in Kotlin. You can write a function like this: /** * @param arg the string to garble */ fun doThing(@NotEmpty arg: String = "default) In this example, "arg" is mandatory, or else it would have the type "String?", making it nullable. It obviously has a default value. It has an annotation that performs some validation, though admittedly that is a library and not a language feature. And it has its own documentation. I find this more concise than the Powershell example.