error[E0599]: no method named `unused_1` found for struct `Sparse` in the current scope
  --> $DIR/use-skipped-getter-1.rs:14:23
   |
4  | / #[derive(Debug)]
5  | | pub struct Sparse {
   | |___- method `unused_1` not found for this
...
14 |       assert_eq!(sparse.unused_1(), 0); // ERROR!
   |                         ^^^^^^^^ method not found in `Sparse`