[Rust] Retrieving data from a map with unwrap

use std::collections::HashMap;

fn main() {
    let mut hash = HashMap::new();

    hash.insert("one", "eins");
    hash.insert("two", "zwei");
    hash.insert("three", "drei");

    let data = *(hash.get("one").unwrap());
    assert_eq!(data, "eins");
}