#![allow(unused_variables)]
fn main() {
    #[allow(dead_code)]
    pub struct Foo(Vec<u32>, Vec<String>);
    impl std::borrow::Borrow<[u32]> for Foo {
        fn borrow(&self) -> &[u32] {
            &self.0
        }
    }
    impl std::borrow::Borrow<[String]> for Foo {
        fn borrow(&self) -> &[String] {
            &self.1
        }
    }
}