#![allow(unused)]

trait X<'a> {
    fn signature(&'a self) -> &'a str;
}

struct Y(String);

impl<'a> X<'a> for Y {
    fn signature(&'a self) -> &'a str {
        &self.0
    }
}

fn get_signature<'a, T: 'a + X<'a>>(x: T) -> String {
    String::from(x.signature())
}

fn main() {
    let x = Y(String::from("hello"));
    println!("{}", get_signature(x));

}