Create a record to store any type of value
```rs extern crate string_map;
use string_map::StringMap;
fn main() { let mut dict = StringMap::new(); dict.insert("number", 0); dict.insert("string", "str"); dict.insert("boolean", true);
assert_eq!(dict.get("number"), Some(&0));
assert_eq!(dict.get_mut("string"), Some(&mut "str"));
assert_eq!(dict.remove("boolean"), Some(true));
} ```