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: lib.rs
    path of file: ./repos/Theseus/applications/example/src
    
    the code of the file until where you have to start completion: //! This application is an example of how to write applications in Theseus.

#![no_std]

extern crate alloc;
#[macro_use] extern crate app_io;
extern crate getopts;

use alloc::vec::Vec;
use alloc::string::String;
use getopts::Options;


pub fn main(args: Vec<String>) -> isize {
    let mut opts = Options::new();
    opts.optflag("h", "help", "print this help menu");

    println!("Th
    
pub fn main(args: Vec<String>) -> isize {
    let mut opts = Options::new();
    opts.optflag("h", "help", "print this help menu");

    println!("This is an example application.\nArguments: {:?}", args);

    let matches = match opts.parse(args) {
        Ok(m) => m,
        Err(_f) => {
            println!("{}", _f);
            print_usage(opts);
            return -1; 
        }
    };

    if matches.opt_present("h") {
        print_usage(opts);
        return 0;
    }

    0
}