error[E0046]: not all trait items implemented, missing: `foo`, `bar`, `test`, `baz`
  --> $DIR/suggest-missing-item.rs:19:1
   |
LL |     async fn foo();
   |     --------------- `foo` from trait
...
LL |     async fn bar() -> i32;
   |     ---------------------- `bar` from trait
LL |
LL |     fn test(&self) -> impl Sized + '_;
   |     ---------------------------------- `test` from trait
...
LL |     async fn baz(&self) -> &i32;
   |     ---------------------------- `baz` from trait
...
LL | impl Trait for S {}
   | ^^^^^^^^^^^^^^^^ missing `foo`, `bar`, `test`, `baz` in implementation

error: aborting due to previous error

For more information about this error, try `rustc --explain E0046`.