Note: this is inefficient anyway, don't do it in the first place. but just saying you wanted to:

to go from `Vec<Whatever>` to `Vec<Rc<Whatever>>`, instead of this:

    let thenewvec: Vec<Rc<Whatever>> = thevec.iter().map(|&x| Rc::new(x)).collect();

do this:

    let thenewvec: Vec<Rc<Whatever>> = thevec.into_iter().map(|x| Rc::new(x)).collect();