How can I create a sub-scope of a CoroutineScope? I'm looking for something like

val parentScope: CoroutineScope
val childScope = parentScope.something()

I want childScope to be cancelled if parentScope is, but for parentScope not to be cancelled if childScope is

CoroutineScope(parentScope.coroutineContext + SupervisorJob())

or

supervisorScope { your child code() }

Thank you