pub trait Fruit {
    fn name(&self) -> &'static str;
}

pub struct Banana {

}

impl Fruit for Banana {
    fn name(&self) -> &'static str {
        "Banana"
    }
}

fn main() {
    use std::sync::Arc;
    let banana_arc = Arc::new(Banana{});

    let stack_banana = Banana{};
    let stack_fruit: &dyn Fruit = &stack_banana;
    println!("{}", stack_fruit.name());
    let banana: &Banana = &banana_arc;
    let fruit: &dyn Fruit = banana;

    println!("{}", fruit.name());
}