Propagate state down the widget tree

[JohnnyRainbow81]

Hi,
I am using stacked for a good while now, but honestly I did not achieve clarity on how to let children, grand-children, grand-grand-children, (etc) know about when the state of their (grand-)parent changes - without rebuilding the whole widget tree ?

Of course, the (grand-)parent could just rebuild itself, but that would be wasteful.

How do I achieve with stacked that only the children rebuild when the parent updates a value where only a child is interested in?

This is really basic I guess, but I could not answer this to myself clearly.

Is there some kind of InheritedWidget / Provider / ... functionality where state is propagated down the tree to only the interested children and let those rebuild only?