#![allow(dead_code, deprecated, unused_variables, unused_mut)]
trait Foo {
    fn bar(&self) -> u8;
    fn baz(&self);
    fn qux(&self) -> Result<u64, ()>;
}
struct MyStruct;
impl Foo for MyStruct {
    fn bar(&self) -> u8 {
        1 + 1
    }
    fn baz(&self) {
        unimplemented!();
    }
    fn qux(&self) -> Result<u64, ()> {
        unimplemented!("MyStruct isn't quxable");
    }
}
fn main() {
    let s = MyStruct;
    s.bar();
}