Enum
class EnumPersistentDataType<E : Enum<E>>(val enumClass: Class<E>) : PersistentDataType<String, E> (source)
A PersistentDataType that can be used with any enum class (such as org.bukkit.Material).
Assumes that the enum names do not change between serialization and deserialization. (For example, if you serialize Sound.EPIC_SOUND and later rename it to Sound.GREAT_SOUND, this will obviously fail to deserialize as Sound.EPIC_SOUND no longer exists).