How can I marshal

ObservableList<ObservableList<ObservableValue<Any>>>

? Do I need inherit and annotate it? Are there better (Kotlin-specific) ways to marshal an object?

Marshal to what? Do you mean serialize? If so,

ObservableList

doesn't implement

Serializable

... and neither does anything else in that declaration.

Yep, I've just discovered it. So what is the simple way to save state of an object (e.g.

TableView

)? I'm new to this concept, but need to implement serialization/marshalling, and, pehaps, save it into XML database or just into a file