use std::{any::Any, collections::HashMap};

fn main() {
    println!("Hello, world!");
    let s = SHM::new();
    s.get(&Screen::Login).unwrap().downcast_ref::<Login>();
}

trait Page: Any {}
struct Login;
impl Page for Login {}
type SHM = HashMap<Screen, Box<dyn Page>>;
#[derive(Debug, Hash, PartialEq, Eq)]
enum Screen {
    Login,
}

    Checking tdowncast v0.1.0 (E:\Coding\Code\Rust\tdowncast)
error[E0599]: no method named `downcast_ref` found for reference `&Box<dyn Page>` in the current scope
 --> src\main.rs:6:36
  |
6 |     s.get(&Screen::Login).unwrap().downcast_ref::<Login>();
  |                                    ^^^^^^^^^^^^
  |
help: there is a method `as_ref` with a similar name
  |
6 -     s.get(&Screen::Login).unwrap().downcast_ref::<Login>();
6 +     s.get(&Screen::Login).unwrap().as_ref::<Login>();
  |

For more information about this error, try `rustc --explain E0599`.