hiddenWhen

fun <T : Node> T.hiddenWhen(expr: () -> ObservableValue<Boolean>): T

This extension function will make sure to hide the given node, if the given expr returning an observable boolean value equals true.

fun <T : Node> T.hiddenWhen(predicate: ObservableValue<Boolean>): <ERROR CLASS>

This extension function will make sure to hide the given node, if the given predicate an observable boolean value equals true.