Is it possible to restrict `root` from nesting? `...

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[irus]

Is it possible to restrict root from nesting?

@DslMarker
@Target(AnnotationTarget.CLASS, AnnotationTarget.TYPE)
annotation class ConfigMarker

@ConfigMarker
class Root

fun root(body: (@ConfigMarker Root).() -> Unit) { }

fun main(args: Array<String>) {
    root {
        root { // <- this should be compiler error
        }
    }
}

(with new DslMarker, i know about @Deprecated approach :)