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How can I remove a Composable function entirely from UI Tree without losing state so that it does not visible, take spaces, consume events etc.?
When I write like `if(someState) Content()`, the internal states may fly away. (such as value remembered by `remember {}`)
Generally speaking, can I prevent emitting the nodes? (Maybe linking to another composition with wrapper Applier which conditionally delegates to parent applier..? - this would overkill)

Do you mind sharing your use-case? just interested on why would you need that.

In terms of internal state, have you considered hoisting it up to the parent and just passing the state to `Content()` when you want to display it?

I had a use case but I now think just setting alpha = 0f would appropriate.
So it was just curiosity; is it possible?

Hoisting state would be okay. But regarding performance, it would be `a little little bit` slower?
I thought this when I implement custom animation to navigation; things still happen in the back stack so I wanted to get rid of them out of UI tree.