fn MyComponent() -> Element {
    let child_signal = use_signal(|| None);

    rsx! {
        // A signal from a child is read or written to in a parent scope (with a lower height)
        "{child_signal:?}"
        IncrementButton {
            child_signal
        }
    }
}

#[component]
fn IncrementButton(mut child_signal: Signal<Option<Signal<i32>>>) -> Element {
    let signal_owned_by_child = use_signal(|| 0);
    // Don't do this: it may cause issues if you drop the child component
    child_signal.set(Some(signal_owned_by_child));

    todo!()
}