fn main() {
    let mut closures = Vec::new();

    // Two closures both with the signature Fn(u8) -> ()
    let closure1 = |i: u8| println!("closure1 {}", i);
    let closure2 = |i: u8| println!("closure2 {}", i);

    closures.push(closure1);
    //closures.push(closure2)

    for closure in closures {
        closure(5);
    }
}