YesNoAlert

 val alert = YesNoAlert(
   parent = stage
   title = "Confirmation Dialog with Custom Actions",
   header = "Look, a Confirmation Dialog with Custom Actions.",
   content = "Choose your option."
 )

 val result = alert.showAndWait()

 result match {
   case Some(ButtonTypeYes) => println("... user chose \"Yes\"")
   case Some(ButtonTypeNo) => println("... user chose \"No\"")
   case _ => println("... user chose CANCEL or closed the dialog")
 }