trait Jelly {
    fn git(&self);
}

struct Jone;
impl Jelly for Jone {
    fn git(&self) {}
}
struct Jtwo;
impl Jelly for Jtwo {
    fn git(&self) {}
}

fn main() {
    let js: Vec<Box<dyn Jelly>> = vec![
        Box::new(Jone {}),
        Box::new(Jtwo {}),
    ];

    for b in &js {
        b.git();
    }
}