You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: custom_time.rs
    path of file: ./repos/jsonwebtoken/examples
    
    the code of the file until where you have to start completion: use jsonwebtoken::{Algorithm, DecodingKey, EncodingKey, Header, Validation};
use serde::{Deserialize, Serialize};
use time::{Duration, OffsetDateTime};

const SECRET: &str = "some-secret";

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Claims {
    sub: String,
    #[serde(with = "jwt_numeric_dat
    
        fn should_fail_on_invalid_timestamp() {
            // A token with the expiry of i64::MAX + 1
            let overflow_token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJDdXN0b20gRGF0ZVRpbWUgc2VyL2RlIiwiaWF0IjowLCJleHAiOjkyMjMzNzIwMzY4NTQ3NzYwMDB9.G2PKreA27U8_xOwuIeCYXacFYeR46f9FyENIZfCrvEc";

            let decode_result = decode::<Claims>(
                &overflow_token,
                &DecodingKey::from_secret(SECRET.as_ref()),
                &Validation::new(Algorithm::HS256),
            );

            assert!(decode_result.is_err());
        }