fn make_wrapper<F, Arg>(f: F) -> Box<dyn Fn(&i32)>
where
    Arg: for<'a> CreateFromI32Ref<'a>,
    F: Fn(Arg) + 'static
{
    Box::new(move |i32_ref: &i32| {
        f(Arg::create_from_i32_ref(i32_ref))
    })
}

trait CreateFromI32Ref<'a>: 'a {
    fn create_from_i32_ref(i32_ref: &'a i32) -> Self;
}

impl<'a> CreateFromI32Ref<'a> for i32 {
    fn create_from_i32_ref(i32_ref: &'a i32) -> i32 {
        *i32_ref
    }
}

impl<'a: 'b, 'b: 'a> CreateFromI32Ref<'a> for &'b i32 {
    fn create_from_i32_ref(i32_ref: &'a i32) -> &'b i32 {
        i32_ref
    }
}

fn main() {
    fn wrappee(arg: i32) { println!("{}", arg) }
    make_wrapper(wrappee)(&100i32);

    fn wrappee2(arg: &i32) { println!("{}", *arg) }
    make_wrapper(wrappee2)(&200i32);
}