use serde::{Serialize, Deserialize};
#[derive(Serialize, Deserialize)]
struct Data {
arr: Vec<i32>,
}
let data: Data = Data {
arr: vec![2, 3, 5, 7],
};
let data_s = serde_xml_rs::
to_string(&data).unwrap();
//data_s is <Data><arr>2</arr><arr>3...
println!("data_s is '{}'", data_s);