[Feature Request] lazy @val properties

[EotT123]

Could it be possible to add lazy initialized fields when using properties? (similar to Lombok's @Getter(lazy=true)

The same syntax could be used, e.g. @val(lazy = true) Object object = <ExpensiveCalculation>;. This should only be added for @val (not for @var,@set,...), as it is only relevant for immutable fields.

[rsmckinney]

I am probably going to expand properties to support observable, delegation, lazy etc. a la Kotlin. See #256.