discriminator can be used for class names, such that the name of the class should be part of the product with keyName as keyName.

Example:

@discriminator("type")
sealed trait FooBar
case class Bar(x: Int) extends FooBar
case class Foo(y: String) extends FooBar
case object Fooz extends FooBar

case class AppConfig(config :  FooBar)

corresponds to

config : {
  type : Bar
  x : Int
 }

or

config : {
  type: Foo
  x: Int
 }

or

config : Fooz

If annotation is name instead of discriminator, then name of the case class becomes a parent node

Foo : {
 x : Int
}