trait Dropable {}
impl<T> Dropable for T {}

fn main() {
    let mut drop_later: Vec<Box<dyn Dropable>> = Vec::new();
    drop_later.push(Box::new(std::fs::File::open("/tmp/abc.txt")));
    drop_later.push(Box::new(std::net::TcpStream::connect("example.com")));
    // For example purposes only. Feel free to imagine something more useful than "6"
    drop_later.push(Box::new(6));

    // Now it's later!
    drop(drop_later);
}