> That is, suppose I have something that, semantically, I want to move into a function, and which the function later returns. I think I could also pass a `& mut

> That is, suppose I have something that, semantically, I want to move into a function, and which the function later returns. I think I could also pass a `& mut` instead. That is exactly what `&mut` is for. An &mut gives you an "ownership lease" on an object; you own it as long as you have the &mut.