in gazebo/src/cell.rs [318:327]
fn test_as_aref() {
fn get_str(x: &impl AsARef<String>) -> ARef<str> {
ARef::map(AsARef::as_aref(x), |x| x.as_str())
}
let a = RefCell::new("hello".to_owned());
let b = "world".to_owned();
assert_eq!(&*get_str(&a), "hello");
assert_eq!(&*get_str(&b), "world");
}