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: main.rs
    path of file: ./repos/aion/example
    
    the code of the file until where you have to start completion: use aion::*;
use chrono::{TimeZone, Utc};

fn main() {
    // Easily represent a chrono::Duration
    let two_days = 2.days();
    println!("2 days: {:?}", two_days);
    let attention_span = 1.seconds();
    println!
    
fn main() {
    // Easily represent a chrono::Duration
    let two_days = 2.days();
    println!("2 days: {:?}", two_days);
    let attention_span = 1.seconds();
    println!("Attention span: {:?}", attention_span);

    // Add or subtract durations from the current time (UTC)
    let now = Utc::now();
    let three_hours_from_now = now + 3.hours();
    println!("3 hours from now: {}", three_hours_from_now);
    let two_hours_from_now = 2.hours().from_now();
    println!("2 hours from now: {}", two_hours_from_now);
    let last_week = 7.days().ago(); // or 1.weeks().ago()
    println!("1 week ago: {}", last_week);

    // More complex DateTimes can be represented using before() and after() methods
    let christmas = Utc.ymd(2020, 12, 25).and_hms(0, 0, 0);
    let two_weeks_before_christmas = 2.weeks().before(christmas);
    println!("2 weeks before christmas: {}", two_weeks_before_christmas);
    let boxing_day = 1.days().after(christmas);
    println!("Boxing day: {}", boxing_day);
}