use std::collections::BTreeMap;

#[derive(Debug)]
enum Order {
    SubmitOrder { x: Option<String>, y: Option<String>},
    #[allow(dead_code)]
    AcceptOrder { x: String, y: String},
}

fn process(params: BTreeMap<String, String>) -> Order {
    Order::SubmitOrder {
        x: params.get("x").map(|s| s.clone()),
        y: params.get("y").map(|s| s.clone()),
    }
}

fn main() {
    let mut params = BTreeMap::new();
    params.insert("x".to_string(), "1".to_string());
    params.insert("y".to_string(), "2".to_string());
    println!("{:?}", process(params));
}