Code shared from the Rust Playground

playground.rs

`use dashmap::DashMap;
use std::sync::{Mutex, Arc};

struct Model {
    pub value: String,
}

fn main() {
    let map: Arc<DashMap<String, Model>> = Arc::new(DashMap::new());

    map.insert(String::from("1"), Model {value: String::from("A")});

    let mut entry1 = map.get_mut("1").unwrap();
    println!("HAS MUT");

    let contains = map.contains_key("1");

    println!("AFTER");
}`