trait Bar {
    fn required(&self);
    fn provided(&self) {
        println!("I'm a boring default...");
    }
}

impl Bar for u32 {
    fn required(&self) {
        println!("u32 yeah yeah");
    }
    fn provided(&self) {
        println!("I'm a uuuuuu32!!");
    }
}

// The impl would be generated
impl<T: Bar> Bar for Box<T> {
    fn required(&self) {
        (**self).required()
    }

    // Remove this to see difference
    fn provided(&self) {
        (**self).provided()
    }
}


fn main() {
    Bar::provided(&0);
    Bar::provided(&Box::new(0));
}