open class HtmlTag

interface NavigationBuilder {
    public var text: ((String) -> String)?
    ~in_NB~var inNavigationBuilder: Int
}

fun HtmlTag.navigation(body: NavigationBuilder.() -> Unit) {
}
fun HtmlTag.a(contents: A.() -> Unit) {
}

interface A : HtmlTag {
    ~text_in_A~var text: String
    ~in_A~var inA: Int
}

fun HtmlTag.test(a: String) {
    navigation {
        a {
            `text_in_A`text = "1"
            `in_NB`inNavigationBuilder = 1
            `in_A`inA = 2
        }
    }
}